Archived from groups: rec.photo.digital (More info?)
I have read a lot from film shooters that they don't like the
"unnatural look" that digital photos have and prefer the look of
film photos. After looking at a large number of digital and film
photos I have to assume that these people have gotten use to the way
film looks and have come to accept it as being the norm for what looks
natural.
So now I have to wonder, do these film shooters complain when they go
out in the real world that it looks unnatural. Does the real world
have that "unnatural digital look" to them. I have to wonder
because looking at digital photos and comparing them to film the
digital seem much closer to the real world then film.
Does the fact that the real world is missing that nice grain look
bother them, do the colors of the real world seem off to them, perhaps
flat and uninteresting?
Scott
Archived from groups: rec.photo.digital (More info?)
"Scott W" <biphoto@hotmail.com> wrote in message
news:1108933286.265301.81330@o13g2000cwo.googlegroups.com...
>I have read a lot from film shooters that they don't like the
> "unnatural look" that digital photos have and prefer the look of
> film photos. After looking at a large number of digital and film
> photos I have to assume that these people have gotten use to the way
> film looks and have come to accept it as being the norm for what looks
> natural.
>
> So now I have to wonder, do these film shooters complain when they go
> out in the real world that it looks unnatural. Does the real world
> have that "unnatural digital look" to them. I have to wonder
> because looking at digital photos and comparing them to film the
> digital seem much closer to the real world then film.
>
> Does the fact that the real world is missing that nice grain look
> bother them, do the colors of the real world seem off to them, perhaps
> flat and uninteresting?
One only captures a facsimile of the real world with any camera. Actually,
a photograph can look better than reality (even without severe retouching).
Then, there are scenes that photographs can only struggle with.
We are at the point where digital is better than film for most
photographers. Those who still use film are certainly justified in their
decision, however. I went to an art show last month with the works of five
photographers on display and every one of them captured in medium format
film and then went digital with a scanner. Their work was stunning (some of
it) and I'd guess they will stick with film for at least several more years.
Archived from groups: rec.photo.digital (More info?)
In article <1108933286.265301.81330@o13g2000cwo.googlegroups.com>, Scott
W says...
> I have read a lot from film shooters that they don't like the
> "unnatural look" that digital photos have and prefer the look of
> film photos. After looking at a large number of digital and film
> photos I have to assume that these people have gotten use to the way
> film looks and have come to accept it as being the norm for what looks
> natural.
>
> So now I have to wonder, do these film shooters complain when they go
> out in the real world that it looks unnatural. Does the real world
> have that "unnatural digital look" to them. I have to wonder
> because looking at digital photos and comparing them to film the
> digital seem much closer to the real world then film.
>
> Does the fact that the real world is missing that nice grain look
> bother them, do the colors of the real world seem off to them, perhaps
> flat and uninteresting?
Agree. Digital is linear, while film is not entirely linear. Therefore
digital more accurately records reality
--
Alfred Molon
------------------------------
Olympus 4040, 5050, 5060, 7070, 8080, E300 forum at
http://groups.yahoo.com/group/MyOlympus/
Olympus 8080 resource - http://myolympus.org/8080/
Archived from groups: rec.photo.digital (More info?)
> Agree. Digital is linear, while film is not entirely linear. Therefore
> digital more accurately records reality
Better to say digital is quantized and film is continuous. A fine point,
perhaps, but worth mentioning.
Archived from groups: rec.photo.digital (More info?)
"Charles Schuler" <charleschuler@comcast.net> wrote in
news:r8KdnbitxuxzjYTfRVn-rQ@comcast.com:
> Better to say digital is quantized and film is continuous. A fine
> point, perhaps, but worth mentioning.
Both are quantizised. Grains are not continous and
so are not photons.
/Roland
Archived from groups: rec.photo.digital (More info?)
Thus spake Alfred Molon:
<Snipped>
> Agree. Digital is linear, while film is not entirely linear. Therefore
> digital more accurately records reality
Records reality? Are you sure any member of the human race is capable of
recognising reality even if bitten on the bum by it? Maybe after evolving
another million years
Maybe by that time, we will also recognise that
"reality" is not a great deal more than what the majority thinks it is.
What do you think of the 8080 Alfred? I haven't handled one but the full
size pictures I've seen on the web were gobsmackingly good IMO: free from
CA/bloom artefacts, natural looking & sharp. I'm just growing older with my
C4040!
--
Thank people in advance? Thanking or cursing them afterwards at least
gives some feedback!
Archived from groups: rec.photo.digital (More info?)
"Roland Karlsson" <roland_dot_karlsson@bonetmail.com> wrote in message
news:Xns9603F2D622269klotjohan@130.133.1.4...
> "Charles Schuler" <charleschuler@comcast.net> wrote in
> news:r8KdnbitxuxzjYTfRVn-rQ@comcast.com:
>
>> Better to say digital is quantized and film is continuous. A fine
>> point, perhaps, but worth mentioning.
>
> Both are quantizised. Grains are not continous and
> so are not photons.
Photons are indeed quantized units of electromagnetic radiation. Film
chemistry and how it reacts to bombardment by light is widely/universally
regarded as a continuous process. You might not realize that photons are
merely a collapse of the wave function of light, and thus have little to do
with this discussion.
Archived from groups: rec.photo.digital (More info?)
"Scott W" <biphoto@hotmail.com> wrote in message
news:1108933286.265301.81330@o13g2000cwo.googlegroups.com...
> I have read a lot from film shooters that they don't like the
> "unnatural look" that digital photos have and prefer the look of
> film photos.
I suspect that in double blind tests that the vast majority of people saying
things like that could not actually tell the difference between digital and
silver photography. After all, their film is digitally processed, too. It is
all digital photography, now.
Archived from groups: rec.photo.digital (More info?)
"Scott W" <biphoto@hotmail.com> writes:
> I have read a lot from film shooters that they don't like the
> "unnatural look" that digital photos have and prefer the look of
> film photos.
"natural"? I don't know what a "natural" digital photo looks like. I
remember when CDs came out, and we had this same discussion about CDs and
vinyl, digital mastering and tapes.
I'm not going to worry about it.
--
Phil Stripling | email to the replyto address is presumed
The Civilized Explorer | spam and read later. email from this URL
http://www.cieux.com/ | http://www.civex.com/ is read daily.
Archived from groups: rec.photo.digital (More info?)
"Scott W" <biphoto@hotmail.com> wrote:
> I have read a lot from film shooters that they don't like the
> "unnatural look" that digital photos have and prefer the look of
> film photos.
It's only _35mm_ shooters you hear that from. MF and LF photographers don't
make grainy prints, so we're used to clean prints. We complain about the
lack of resolution in digital, but other than that are quite happy with it.
David J. Littleboy
Tokyo, Japan
Archived from groups: rec.photo.digital (More info?)
David J. Littleboy wrote:
> It's only _35mm_ shooters you hear that from. MF and LF photographers
don't
> make grainy prints, so we're used to clean prints. We complain about
the
> lack of resolution in digital, but other than that are quite happy
with it.
>
> David J. Littleboy
> Tokyo, Japan
Well what you said does tend to be true, the vast majority of film
photographer complaining about digital do seem to be shooting 35mm.
Scott
Archived from groups: rec.photo.digital (More info?)
Well, there are people swear by the difference between Leica and
Konica, and some can't tell the difference. There are also people swear
by the difference between the Midium format and the 35mm, and some
can't tell the difference. You might also have heard same story between
the Ilfochrome and the RA prints, and, blah blah blah.
It's certainly nothing to excited about if it happens between the
digital and film.
C J Campbell wrote:
> "Scott W" <biphoto@hotmail.com> wrote in message
> news:1108933286.265301.81330@o13g2000cwo.googlegroups.com...
> > I have read a lot from film shooters that they don't like the
> > "unnatural look" that digital photos have and prefer the look of
> > film photos.
>
> I suspect that in double blind tests that the vast majority of people
saying
> things like that could not actually tell the difference between
digital and
> silver photography. After all, their film is digitally processed,
too. It is
> all digital photography, now.
Archived from groups: rec.photo.digital (More info?)
On Sun, 20 Feb 2005 21:01:26 +0000, Scott W wrote:
> I have read a lot from film shooters that they don't like the "unnatural
> look" that digital photos have and prefer the look of film photos. After
> looking at a large number of digital and film photos I have to assume
> that these people have gotten use to the way film looks and have come to
> accept it as being the norm for what looks natural.
>
> So now I have to wonder, do these film shooters complain when they go
> out in the real world that it looks unnatural. Does the real world have
> that "unnatural digital look" to them. I have to wonder because looking
> at digital photos and comparing them to film the digital seem much
> closer to the real world then film.
>
> Does the fact that the real world is missing that nice grain look bother
> them, do the colors of the real world seem off to them, perhaps flat and
> uninteresting?
>
Switching recently from flim to digital photography, I had a similar
feeling at the beginning. It was not so much natural or unnatural, but a
distinct difference. To me, it is more about the viewing medium than the
pictures themselves. People habituated in looking at prints would
initially feel uncomfortable to see them on the screen with greater degree
of contrast, some loss of sharpness with full screen image (compared to
7x5 or 6x4 prints), etc. I guess, those who normally look at slides
through projector, would have less discomfort as the medium would be
closer to the digital.
--
Gautam Majumdar
Please send e-mails to gmajumdar@freeuk.com
Archived from groups: rec.photo.digital (More info?)
Film has never been regarded as a continuous process. It is the original
digital process. A grain is 'turned on' by the incidence of light. Its
chemistry is altered such that it will decompose when washed with
developer. Grains not exposed to light do not decompose and are
dissolved by fixer. A grain is therefore the perfect example of a
bistate i.e. a bit. Film appears to bo continuous due to the large
number of grains.
Its always struck me as ironic that the film crowd who decry digital
don't realise that film is more digital than digital.
Graham
"Charles Schuler" <charleschuler@comcast.net> wrote in message
news:M8Kdnf6B6OIFgYTfRVn-sw@comcast.com...
>
> "Roland Karlsson" <roland_dot_karlsson@bonetmail.com> wrote in message
> news:Xns9603F2D622269klotjohan@130.133.1.4...
> > "Charles Schuler" <charleschuler@comcast.net> wrote in
> > news:r8KdnbitxuxzjYTfRVn-rQ@comcast.com:
> >
> >> Better to say digital is quantized and film is continuous. A fine
> >> point, perhaps, but worth mentioning.
> >
> > Both are quantizised. Grains are not continous and
> > so are not photons.
>
> Photons are indeed quantized units of electromagnetic radiation. Film
> chemistry and how it reacts to bombardment by light is widely/universally
> regarded as a continuous process. You might not realize that photons are
> merely a collapse of the wave function of light, and thus have little to
do
> with this discussion.
>
>
Archived from groups: rec.photo.digital (More info?)
Prints from MF are grainy if you print 'em big enough.
From what I've seen recently, the Kodak SLR/n produces absolutely
clean, natural looking prints at sizes that would show MF grain i.e.
24x16 inches.
My film cameras will shortly be making their way to the great MF
graveyard in the sky (Ffordes of Inverness).
Graham
"David J. Littleboy" <davidjl@gol.com> wrote in message
news:cvbb5i$41n$1@nnrp.gol.com...
> It's only _35mm_ shooters you hear that from. MF and LF photographers
don't
> make grainy prints, so we're used to clean prints. We complain about the
> lack of resolution in digital, but other than that are quite happy with
it.
>
> David J. Littleboy
> Tokyo, Japan
>
>
>
Archived from groups: rec.photo.digital (More info?)
Scott W Feb 20, 8:12 pm show options
Newsgroups: rec.photo.digital
From: "Scott W" <biph...@hotmail.com>
David J. Littleboy wrote:
> It's only _35mm_ shooters you hear that from. MF and LF photographers
don't
> make grainy prints, so we're used to clean prints. We complain about
the
> lack of resolution in digital, but other than that are quite happy
with it.
> David J. Littleboy
> Tokyo, Japan
Well what you said does tend to be true, the vast majority of film
photographer complaining about digital do seem to be shooting 35mm.
Scott
Yabbut the vast majority of film shooters shoot 35mm, so it only seems
logical they would have more complaints about the changeover.
In any case, it sounds like pretentious twaddle to me.
Archived from groups: rec.photo.digital (More info?)
"gsum" <gsum@bst.com> wrote:
> Prints from MF are grainy if you print 'em big enough.
Depends on the film. The better slide films don't show grain (especially if
you NeatImage the scans). But the detail does peter out.
> From what I've seen recently, the Kodak SLR/n produces absolutely
> clean, natural looking prints at sizes that would show MF grain i.e.
> 24x16 inches.
That's 188 dpi, and the Kodak will look pretty decent, although you'll have
to stay more than 12 or 15" or so away from the print.
But that's also a 9x magnification from 6x7, and film at 9x looks better
than digital at 188 dpi. (That's the same as 35mm vs. 1600 x 2400 (= 3.84
MP) digital at A4.)
> My film cameras will shortly be making their way to the great MF
> graveyard in the sky (Ffordes of Inverness).
Me too: I'm thinking of trading in the 645 stuff for a Mamiya 7.
David J. Littleboy
Tokyo, Japan
Archived from groups: rec.photo.digital (More info?)
"Scott W" <biphoto@hotmail.com> wrote in message
news:1108933286.265301.81330@o13g2000cwo.googlegroups.com...
> I have read a lot from film shooters that they don't like the
> "unnatural look" that digital photos have and prefer the look of
> film photos. After looking at a large number of digital and film
> photos I have to assume that these people have gotten use to the way
> film looks and have come to accept it as being the norm for what looks
> natural.
>
> So now I have to wonder, do these film shooters complain when they go
> out in the real world that it looks unnatural. Does the real world
> have that "unnatural digital look" to them. I have to wonder
> because looking at digital photos and comparing them to film the
> digital seem much closer to the real world then film.
>
> Does the fact that the real world is missing that nice grain look
> bother them, do the colors of the real world seem off to them, perhaps
> flat and uninteresting?
>
> Scott
>
Some people always resist change. Digital really poured on over the last two
or three years thanks to affordable dSLRs, and 3-5 MP cameras in the
$150-$300 range.
Some compact cameras are not the best way to judge digital images. Blooming
of highlights (limited dynamic range), over processed and sharpened look to
some images jpeg artifacts if compression is to high. dSLRs with their
larger sensors produce much more natural looking images. Dynamic range is
still limited, but not as much.
bg
Archived from groups: rec.photo.digital (More info?)
That's OK, 18 inches is the normal minimum viewing distance even
for an A4 print. Also, 188 ppi is as high a resolution as that
of any printer out there at the moment. The highest res. of
the Epson 7600, for example, is about 160 to 170 ppi.
Kodak images at 24x16 look so good as
they are free of even the slightest hint of noise (if the minimum
sensitivity of ISO 160 is used). 645 colour slide film of
comparible speed cannot produce similar quality due to
grain noise which can be reduced by NeatImage but at the
cost of resolution.
The biggest problem with the Kodak is that it ruthlessly
exposes the shortcoming of lenses. The 24x85 kit lens which
was OK with the D100 is too soft for the Kodak.
By the way, thanks to the unfounded bad press, SLR/ns are being
discounted to little more than the price of a Mamiya 7 in th UK.
Graham
"David J. Littleboy" <davidjl@gol.com> wrote in message
news:cvck9q$fdv$1@nnrp.gol.com...
> That's 188 dpi, and the Kodak will look pretty decent, although you'll
have
> to stay more than 12 or 15" or so away from the print.
>
> But that's also a 9x magnification from 6x7, and film at 9x looks better
> than digital at 188 dpi. (That's the same as 35mm vs. 1600 x 2400 (= 3.84
> MP) digital at A4.)
> David J. Littleboy
> Tokyo, Japan
>
>
>
>
Archived from groups: rec.photo.digital (More info?)
In article <1108985723.623439.248490@l41g2000cwc.googlegroups.com>,
charliediy@aol.com says...
> Well what you said does tend to be true, the vast majority of film
> photographer complaining about digital do seem to be shooting 35mm.
>
> Scott
>
> Yabbut the vast majority of film shooters shoot 35mm, so it only seems
> logical they would have more complaints about the changeover.
>
> In any case, it sounds like pretentious twaddle to me.
>
>
"Pretentious Twaddle"
I LOVE IT!
CAN I USE IT???
Seriously, I've been shooting film since 1959 (started with a 120 box
camera).
This "film is better" argument comes mostly from pixel peepers who think that
anything they can find in a photo under a magnifier is pertinant.
The issue SHOULD be the final product, but they cant get past their
predjudices to the print (or slide).
For years and years I would go through the ritual of changing film and/or
filters every time the light changed. Now its a simple matter of setting a
couple of buttons on the camera, or shooting RAW and making the decision
LATER.
Those advantages alone should drive a photographer to use digital for at
least SOME of his ((at least) outside the studio) work.
I'm not saying ABANDON FILM, I'm saying "If you dont familiarize yourself
with, and LEARN digital you will lose in the long run".
--
Larry Lynch
Mystic, Ct.
Archived from groups: rec.photo.digital (More info?)
In article <MPG.1c83ae78edd46cc29896d1@news.individual.NET>,
Larry <larrylynch3rd@comcast.net> wrote:
>
>For years and years I would go through the ritual of changing film and/or
>filters every time the light changed. Now its a simple matter of setting a
>couple of buttons on the camera, or shooting RAW and making the decision
>LATER.
You're allowed to do the same to scanned film in Photoshop, you know.
We promise we won't tell anyone...
Seriously - all changing the white balance in-camera is dooing is selective
boosting of some colour channels. If you're shooting in tungsten light, for
example, you will get a boost applied to the blue channel, which will
be under-exposed compared to the red and green channels. This isn't really
any different from shooting daylight film and boosting the blue yourself
before you print.
The problem with doing this is that, in th eabove scenario, the boosted
channel will essentially be getting push-processed quite a bit, and that
increases noise. For the best results with digital, you want to be using
coloured filters, just like the "old-fashioned" way with film. That way, you
expose the channels more evenly, and get a cleaner end result.
Archived from groups: rec.photo.digital (More info?)
"gsum" <gsum@bst.com> wrote in message
news:421992bf$1_1@baen1673807.greenlnk.net...
> Film has never been regarded as a continuous process. It is the original
> digital process. A grain is 'turned on' by the incidence of light. Its
> chemistry is altered such that it will decompose when washed with
> developer. Grains not exposed to light do not decompose and are
> dissolved by fixer. A grain is therefore the perfect example of a
> bistate i.e. a bit. Film appears to bo continuous due to the large
> number of grains.
I was afraid that this discussion was headed toward the metaphysical. A
process can be binary at its lowest level but function as a continuous
process at a practical level. The macro behavior of film is a continuous
process.
In a digital camera, the A to D converters "force" a digital constraint on
the information. Also, the fixed sensor site pitch produces spatial
aliasing, which is not to be found with film processes.
Archived from groups: rec.photo.digital (More info?)
On Mon, 21 Feb 2005 09:34:44 -0500, "Charles Schuler"
<charleschuler@comcast.net> wrote:
>
>"gsum" <gsum@bst.com> wrote in message
>news:421992bf$1_1@baen1673807.greenlnk.net...
>> Film has never been regarded as a continuous process. It is the original
>> digital process. A grain is 'turned on' by the incidence of light. Its
>> chemistry is altered such that it will decompose when washed with
>> developer. Grains not exposed to light do not decompose and are
>> dissolved by fixer. A grain is therefore the perfect example of a
>> bistate i.e. a bit. Film appears to bo continuous due to the large
>> number of grains.
>
>I was afraid that this discussion was headed toward the metaphysical. A
>process can be binary at its lowest level but function as a continuous
>process at a practical level. The macro behavior of film is a continuous
>process.
At the quantum physical level all matter
is "digital". Physical chemistry and
semiconductors are based on that, so it's
hardly an abstract theory.
>In a digital camera, the A to D converters "force" a digital constraint on
>the information. Also, the fixed sensor site pitch produces spatial
>aliasing, which is not to be found with film processes.
In film the sensors are randomly
distributed... that's the main reason
why film images aren't subject to
aliasing effects.
rafe b.
http://www.terrapinphoto.com
Archived from groups: rec.photo.digital (More info?)
Roland Karlsson wrote:
> "Charles Schuler" <charleschuler@comcast.net> wrote in
> news:r8KdnbitxuxzjYTfRVn-rQ@comcast.com:
>
>
>>Better to say digital is quantized and film is continuous. A fine
>>point, perhaps, but worth mentioning.
>
>
> Both are quantizised. Grains are not continous and
> so are not photons.
>
>
> /Roland
I would say it a little differently. Spatially, both are sampled data.
However, in a digital the data is truly quantized in a constant
increment step quantization.
Film density is a little different. The density has noise due to the
grain. So the math is a little different. In a sense, film at the
limit is somewhat like a one bit quantization (line drawing).
Archived from groups: rec.photo.digital (More info?)
In article <4m7pe2-tvk.ln1@narcissus.dyndns.org>,
cpbrown@ntlworld.no_uce_please.com says...
> You're allowed to do the same to scanned film in Photoshop, you know.
> We promise we won't tell anyone...
>
> Seriously - all changing the white balance in-camera is dooing is selective
> boosting of some colour channels. If you're shooting in tungsten light, for
> example, you will get a boost applied to the blue channel, which will
> be under-exposed compared to the red and green channels. This isn't really
> any different from shooting daylight film and boosting the blue yourself
> before you print.
>
> The problem with doing this is that, in th eabove scenario, the boosted
> channel will essentially be getting push-processed quite a bit, and that
> increases noise. For the best results with digital, you want to be using
> coloured filters, just like the "old-fashioned" way with film. That way, you
> expose the channels more evenly, and get a cleaner end result.
>
Yes I can scan the film, run it through Photoshop, and get, essentially the
same picture I could have gotten in one step (without the detour and time of
film developing) with a good digital.
I use digital imaging to make my life EASIER, is there a reason I shouldn't
do that?????
--
Larry Lynch
Mystic, Ct.
Archived from groups: rec.photo.digital (More info?)
Chris Brown <cpbrown@ntlworld.no_uce_please.com> wrote:
> Seriously - all changing the white balance in-camera is dooing is
> selective boosting of some colour channels. If you're shooting in
> tungsten light, for example, you will get a boost applied to the
> blue channel, which will be under-exposed compared to the red and
> green channels. This isn't really any different from shooting
> daylight film and boosting the blue yourself before you print.
> The problem with doing this is that, in the above scenario, the
> boosted channel will essentially be getting push-processed quite a
> bit, and that increases noise. For the best results with digital,
> you want to be using coloured filters, just like the "old-fashioned"
> way with film. That way, you expose the channels more evenly, and
> get a cleaner end result.
I can see the reasoning behind this but, but... use a filter, and you
lose light. So, if you happen to be working in a controlled
environment with plenty of light this might make sense, but otherwise
you'll just have to increase exposure, with all the usual problems.
For many people, most of the time, the problem of tungsten light is
accompained by the problem of low light. So, use a filter and you may
need to boost the ISO. In such circumstances you're better off
without the filter.
Andrew.
Archived from groups: rec.photo.digital (More info?)
In article <MPG.1c83c0da9d5153e19896d9@news.individual.NET>,
Larry <larrylynch3rd@comcast.net> wrote:
>In article <4m7pe2-tvk.ln1@narcissus.dyndns.org>,
>cpbrown@ntlworld.no_uce_please.com says...
>> You're allowed to do the same to scanned film in Photoshop, you know.
>> We promise we won't tell anyone...
>>
>> Seriously - all changing the white balance in-camera is dooing is selective
>> boosting of some colour channels. If you're shooting in tungsten light, for
>> example, you will get a boost applied to the blue channel, which will
>> be under-exposed compared to the red and green channels. This isn't really
>> any different from shooting daylight film and boosting the blue yourself
>> before you print.
>>
>> The problem with doing this is that, in th eabove scenario, the boosted
>> channel will essentially be getting push-processed quite a bit, and that
>> increases noise. For the best results with digital, you want to be using
>> coloured filters, just like the "old-fashioned" way with film. That way, you
>> expose the channels more evenly, and get a cleaner end result.
>>
>
>Yes I can scan the film, run it through Photoshop, and get, essentially the
>same picture I could have gotten in one step (without the detour and time of
>film developing) with a good digital.
My point was in relation to the claim that filters for colour balance are
necessary for film, and unnecessary for digital. This claim is untrue, for
the reasons I stated above. You don't need colour filters for either, but
both will benefit from them.
Archived from groups: rec.photo.digital (More info?)
In article <111k16ok6ti8770@news.supernews.com>,
<andrew29@littlepinkcloud.invalid> wrote:
[tungsten filters]
>I can see the reasoning behind this but, but... use a filter, and you
>lose light. So, if you happen to be working in a controlled
>environment with plenty of light this might make sense, but otherwise
>you'll just have to increase exposure,
Well, that depends on what you're doing - if you're using a nice, fast lens,
on a decent DSLR at 400 ISO, you would expect to still be in the range of
decent shutter speeds for handholding even under artificial light. You might
also be using a tripod, or an IS lens.
Of course, if using a filter does put you in a situation where the shutter
speed is pushed over the line, or you need an ISO boost, you may indeed be
better off taking the noise-hit from using white balance. The best course of
action depends on the conditions.
>with all the usual problems.
>For many people, most of the time, the problem of tungsten light is
>accompained by the problem of low light. So, use a filter and you may
>need to boost the ISO. In such circumstances you're better off
>without the filter.
Indeed - setting the white balance to tungsten is essentially boosting the
ISO for the blue channel, using a filter may require you to boost all 3.
However, if you do have sufficient light, or are using a tripod, and can
live with the slow shutter speed, using a filter will always give better
results.
Archived from groups: rec.photo.digital (More info?)
"Charles Schuler" <charleschuler@comcast.net> wrote in
news:M8Kdnf6B6OIFgYTfRVn-sw@comcast.com:
> Photons are indeed quantized units of electromagnetic radiation. Film
> chemistry and how it reacts to bombardment by light is
> widely/universally regarded as a continuous process.
I don't think so. Grains are not continous.
You might confuse it with "continous tone"
which is a term in litography for processes that
can produce grey tones?
> You might not
> realize that photons are merely a collapse of the wave function of
> light,
Yes I do.
> and thus have little to do with this discussion.
Actually - it has. At low light levels it is more than obvious that
the notion of photons is important.
/Roland
Archived from groups: rec.photo.digital (More info?)
In message <4m7pe2-tvk.ln1@narcissus.dyndns.org>,
Chris Brown <cpbrown@ntlworld.no_uce_please.com> wrote:
>The problem with doing this is that, in th eabove scenario, the boosted
>channel will essentially be getting push-processed quite a bit, and that
>increases noise. For the best results with digital, you want to be using
>coloured filters, just like the "old-fashioned" way with film. That way, you
>expose the channels more evenly, and get a cleaner end result.
On my 20D, under incandescent light, the ratio of R:G:B in RAW, linear
values for a white card are about 90:100:25. An 80B filter changes that
to about 90:100:50.
The problem with incandescents and digitals is generally not too much
red, as many people think; it is too little blue. The incandescent does
have more red than green, but the bayer filters are generally less
sensitive for the red channel, evening the green and red out pretty
well.
What would be really nice would be a light source that allowed seperate
control of R, G, and B levels and thoroughly mixed them to avoid colored
shadows.
--
<>>< ><<> ><<> <>>< ><<> <>>< <>>< ><<>
John P Sheehy <JPS@no.komm>
><<> <>>< <>>< ><<> <>>< ><<> ><<> <>><
Archived from groups: rec.photo.digital (More info?)
In message <4219d82d$1_5@newsfeed.slurp.net>,
"BG250" <anon@anon.com> wrote:
>Dynamic range is
>still limited, but not as much.
This will be true until the ADCs used go higher than 12-bit. Most DSLRs
at ISO 100 are limited by quantization, not noise. If they were limited
by noise, ISO 1600 on these cameras would be unusable.
Whatever performance is possible for ISO 1600 on a 12-bit DSLR (one
where 1600 truly has 16x the amplification of ISO 100), the same would
be possible at ISO 100 under-exposed by 4 stops if it had a quality
16-bit converter.
--
<>>< ><<> ><<> <>>< ><<> <>>< <>>< ><<>
John P Sheehy <JPS@no.komm>
><<> <>>< <>>< ><<> <>>< ><<> ><<> <>><
Archived from groups: rec.photo.digital (More info?)
In message <f8fpe2-nal.ln1@narcissus.dyndns.org>,
Chris Brown <cpbrown@ntlworld.no_uce_please.com> wrote:
>Indeed - setting the white balance to tungsten is essentially boosting the
>ISO for the blue channel, using a filter may require you to boost all 3.
The results of such a compromise depends on which end of the ISO range
you're at. Going from 100 to 200 or 400 is not as big a compromise as
going from 800 to 1600, or 400 to 1600. ISO 100 is generally very
compromised already (compared to its analog potential), as the
posterization floor is more significant than the sensor and readout
noise floor. The 12-bit ADC circuit wastes much of the analog level
detail captured in the sensor at ISO 100.
--
<>>< ><<> ><<> <>>< ><<> <>>< <>>< ><<>
John P Sheehy <JPS@no.komm>
><<> <>>< <>>< ><<> <>>< ><<> ><<> <>><
Archived from groups: rec.photo.digital (More info?)
What is the EV Range of digital anyway?
I only use mine for point and shoot sort of stuff and it does lokk a
lot flatter than I'm used to..
Archived from groups: rec.photo.digital (More info?)
In article <37sjhuF5d9k3oU1@individual.net>, Paul Busby says...
> What do you think of the 8080 Alfred? I haven't handled one but the full
> size pictures I've seen on the web were gobsmackingly good IMO: free from
> CA/bloom artefacts, natural looking & sharp. I'm just growing older with my
> C4040!
The 8080 has a very good lens, much better than the one of the 4040 or
5050 (which both have the same lens). Chromatic aberrations are low, and
the lens is sharp. The lens of the 8080 is more capable of supporting
8MP than the lens of the 5050 is capable of supporting 5MP (this is the
result of a test I made - I currently have both cameras). By the way,
the China photo gallery is entirely shot with an 8080:
http://www.molon.de/galleries/China/
--
Alfred Molon
------------------------------
Olympus 4040, 5050, 5060, 7070, 8080, E300 forum at
http://groups.yahoo.com/group/MyOlympus/
Olympus 8080 resource - http://myolympus.org/8080/
Archived from groups: rec.photo.digital (More info?)
JPS@no.komm wrote in news:rh9k11h304j2b09ltrp172quebikgvu2ro@4ax.com:
> This will be true until the ADCs used go higher than 12-bit. Most DSLRs
> at ISO 100 are limited by quantization, not noise. If they were limited
> by noise, ISO 1600 on these cameras would be unusable.
Yepp, sounds reasonable. It could be though that a pre amplification,
before doing the A/D conversion, might limit the noise. But ... you
are probably right. More bits and under exposure would then be the
same as pushing to a higher ISO.
/Roland
Archived from groups: rec.photo.digital (More info?)
In message <Xns9604E3B7FA72Fklotjohan@130.133.1.4>,
Roland Karlsson <roland_dot_karlsson@bonetmail.com> wrote:
>JPS@no.komm wrote in news:rh9k11h304j2b09ltrp172quebikgvu2ro@4ax.com:
>> This will be true until the ADCs used go higher than 12-bit. Most DSLRs
>> at ISO 100 are limited by quantization, not noise. If they were limited
>> by noise, ISO 1600 on these cameras would be unusable.
>Yepp, sounds reasonable. It could be though that a pre amplification,
>before doing the A/D conversion, might limit the noise. But ... you
>are probably right. More bits and under exposure would then be the
>same as pushing to a higher ISO.
That's where all the dynamic range and exposure lattitude that many
people are complaining about lies; it doesn't matter one bit how
noiseless a sensor is, if it is only digitizing at 12 bits.
--
<>>< ><<> ><<> <>>< ><<> <>>< <>>< ><<>
John P Sheehy <JPS@no.komm>
><<> <>>< <>>< ><<> <>>< ><<> ><<> <>><
Archived from groups: rec.photo.digital (More info?)
> At the quantum physical level all matter
> is "digital". Physical chemistry and
> semiconductors are based on that, so it's
> hardly an abstract theory.
Richard Feynman said, in essence, that "Nobody understands quantum
mechanics."
Archived from groups: rec.photo.digital (More info?)
"Charles Schuler" <charleschuler@comcast.net> wrote in message
news
aidnXbZwIUbbITfRVn-vg@comcast.com...
>
> "gsum" <gsum@bst.com> wrote in message
> news:421992bf$1_1@baen1673807.greenlnk.net...
> > Film has never been regarded as a continuous process. It is the original
> > digital process. A grain is 'turned on' by the incidence of light. Its
> > chemistry is altered such that it will decompose when washed with
> > developer. Grains not exposed to light do not decompose and are
> > dissolved by fixer. A grain is therefore the perfect example of a
> > bistate i.e. a bit. Film appears to bo continuous due to the large
> > number of grains.
>
> I was afraid that this discussion was headed toward the metaphysical. A
> process can be binary at its lowest level but function as a continuous
> process at a practical level. The macro behavior of film is a continuous
> process.
And to add insult to injury, all continuous processes with noise (i.e., all
continuous processes) are only capable of representing a discrete number of
levels, i.e. the range of values divided by the noise. (Look up "dynamic
range" in an engineering handbook.)
So all analog processes are actually discrete, i.e. digital.
> In a digital camera, the A to D converters "force" a digital constraint on
> the information.
As long as the resolution of the A/D converter exceeds what is required by
the dynamic range of the signal, nothing is imposed at all. The apparently
digital result contains all the information of the nominally analog source
signal. (As long as you interpret the digital value to be specifying a
range, not an exact value.)
> Also, the fixed sensor site pitch produces spatial
> aliasing, which is not to be found with film processes.
Well, not if there's an antialiasing filter. In which case, the signal is
merely bandlimited. Note that spatial aliasing is _artifacting_. That is,
the snap-to-grid eye candy the Foveon fans are so fond of are in reality
incorrect, artifact-ridden images.
David J. Littleboy
Tokyo, Japan
Archived from groups: rec.photo.digital (More info?)
> And to add insult to injury, all continuous processes with noise (i.e.,
> all
> continuous processes) are only capable of representing a discrete number
> of
> levels, i.e. the range of values divided by the noise. (Look up "dynamic
> range" in an engineering handbook.)
SNR = log (base 10) times the ratio of maximum signal amplitude divided by
the noise floor amplitude ... which has little impact on this discussion,
but thanks(?) for tossing that in.
> So all analog processes are actually discrete, i.e. digital.
That is metaphysical stuff; and it serves little purpose on this forum.
Engineers use practical working definitions to develop products that
actually work and hopefully work better.
>> In a digital camera, the A to D converters "force" a digital constraint
>> on
>> the information.
>
> As long as the resolution of the A/D converter exceeds what is required by
> the dynamic range of the signal, nothing is imposed at all. The apparently
> digital result contains all the information of the nominally analog source
> signal. (As long as you interpret the digital value to be specifying a
> range, not an exact value.)
Surely it is imposed. It's simply 2^n where n is the number of bits.
>> Also, the fixed sensor site pitch produces spatial
>> aliasing, which is not to be found with film processes.
>
> Well, not if there's an antialiasing filter. In which case, the signal is
> merely bandlimited. Note that spatial aliasing is _artifacting_. That is,
> the snap-to-grid eye candy the Foveon fans are so fond of are in reality
> incorrect, artifact-ridden images.
There has never been an antialising filter applied to film photography and
there never will be.
This discussion has gone far beyond what most folks care about. I'll
graciously allow you to retain your tortured point of view.
Archived from groups: rec.photo.digital (More info?)
On Mon, 21 Feb 2005 17:45:23 -0500, "Charles Schuler"
<charleschuler@comcast.net> wrote:
>
>
>> At the quantum physical level all matter
>> is "digital". Physical chemistry and
>> semiconductors are based on that, so it's
>> hardly an abstract theory.
>
>Richard Feynman said, in essence, that "Nobody understands quantum
>mechanics."
And who would I be to argue with Richard Feynman?
rafe b.
http://www.terrapinphoto.com
Archived from groups: rec.photo.digital (More info?)
Glad to see a "sane" response here. Almost daily I send out nature
pictures to a wide audience of people. I am sure the majority like them
because of their depiction of nature and probably several because they
are "purty pictures". I only know of one person in the group who
actaully responds to me in terms of pixels and other engineering
gobbledygook. Now I know without the engineers there would be no
incredible cameras like my Nikon D70. Still, I have a very limited
tolerance range for those who go on and on arguing engineering
philosophy when it is the end product that matters. It all reminds me
of the tubes are better for audio than transistors crowd [still alive
and arguing even today] and those who insisted you needed a copper
cable the size of a hawser used to tie up a giant freighter to hear
sound properly on your loudspeakers.
Tom Roach
Archived from groups: rec.photo.digital (More info?)
<JPS@no.komm> wrote:
>
> The problem with incandescents and digitals is generally not too much
> red, as many people think; it is too little blue. The incandescent does
> have more red than green, but the bayer filters are generally less
> sensitive for the red channel, evening the green and red out pretty
> well.
>
> What would be really nice would be a light source that allowed seperate
> control of R, G, and B levels and thoroughly mixed them to avoid colored
> shadows.
What would be nice would be a camera with interchangeable sensors and a
monochrome sensor option. That would almost double the sensitivity (collects
all the R+G at every sensor). Also, you could do B&W landscapes with a deep
red filter with no loss of resolution, and you probably wouldn't need the IR
cut filter, so you could use the camera for IR as well.
What might be neat would be an 8MP monochrome sensor in a full-frame
switchable with the regular 16.7MP Bayer sensor.
David J. Littleboy
djl@Dreaming.on.com
Tokyo, Japan
Archived from groups: rec.photo.digital (More info?)
In article <d2tk1195dv8mlh495o7gnfgrj0l5m0rqtm@4ax.com>,
rafeb@speakeasy.net says...
> >Richard Feynman said, in essence, that "Nobody understands quantum
> >mechanics."
>
>
> And who would I be to argue with Richard Feynman?
His wife?
--
http://www.pbase.com/bcbaird/
Archived from groups: rec.photo.digital (More info?)
J...@no.komm wrote:
> That's where all the dynamic range and exposure lattitude that many
> people are complaining about lies; it doesn't matter one bit how
> noiseless a sensor is, if it is only digitizing at 12 bits.
Well 12 bits does give you 12 stops of dynamic range, if the noise is
low enough. And you can go down 7 stops and the level to level change
is only on the order of 3% not bad at all. So just how is this so
limiting?
Scott
Archived from groups: rec.photo.digital (More info?)
Chris Brown wrote:
> The problem with doing this is that, in th eabove scenario, the boosted
> channel will essentially be getting push-processed quite a bit, and that
> increases noise. For the best results with digital, you want to be using
> coloured filters, just like the "old-fashioned" way with film. That way, you
> expose the channels more evenly, and get a cleaner end result.
Do you have any published research that you can share in the NG that
corroborates the above? It's intuitively correct to me, but I wonder if
the difference is measurable.
--
John McWilliams
Archived from groups: rec.photo.digital (More info?)
In message <1109035246.989000.201380@o13g2000cwo.googlegroups.com>,
"Scott W" <biphoto@hotmail.com> wrote:
>J...@no.komm wrote:
>
>> That's where all the dynamic range and exposure lattitude that many
>> people are complaining about lies; it doesn't matter one bit how
>> noiseless a sensor is, if it is only digitizing at 12 bits.
>
>Well 12 bits does give you 12 stops of dynamic range, if the noise is
>low enough. And you can go down 7 stops and the level to level change
>is only on the order of 3% not bad at all.
Go down 7 stops from where?
You need to leave some headroom, and you have a range used in the
subject(s). Going down 7 stops with those things considered is all the
way down in posterization city.
>So just how is this so limiting?
It is limiting in the sense that 12 bits is not enough to clearly
resolve what the sensor records at ISO 100. Here's an example; I put a
black guitar bag on the floor; and laid my "Canon Digital" neck strap on
top of it. I mounted the 20D on a tripod, pointed down at the strap,
covered it with a grey card, and used manual exposure at ISO 1600 to
center the exposure. I took away the grey card, and took an exposure.
I then left the aperture and shutter speed where they were, and changed
the ISO to 100 (this means the EXACT same exposure on the sensor, other
than noise issues). I took another shot. I put the same crop of the
two RAW (but interpolated within each channel) exposures together, after
using Levels in Photoshop to give them the same tonal curve:
http://www.pbase.com/jps_photo/image/40038800
The strap and bag are black; the green cast is because the color balance
is the native RAW one, under incandescent light.
--
<>>< ><<> ><<> <>>< ><<> <>>< <>>< ><<>
John P Sheehy <JPS@no.komm>
><<> <>>< <>>< ><<> <>>< ><<> ><<> <>><
Archived from groups: rec.photo.digital (More info?)
J...@no.komm wrote:
> In message <1109035246.989000.201380@o13g2000cwo.googlegroups.com>,
>
> Go down 7 stops from where?
>From full white. i.e. 4095 on the 12 bit converter. 7 stops down is =
32, which is not going to show posterization.
>
> You need to leave some headroom, and you have a range used in the
> subject(s). Going down 7 stops with those things considered is all
the
> way down in posterization city.
>
> >So just how is this so limiting?
>
> It is limiting in the sense that 12 bits is not enough to clearly
> resolve what the sensor records at ISO 100. Here's an example; I put
a
> black guitar bag on the floor; and laid my "Canon Digital" neck strap
on
> top of it. I mounted the 20D on a tripod, pointed down at the strap,
> covered it with a grey card, and used manual exposure at ISO 1600 to
> center the exposure. I took away the grey card, and took an
exposure.
> I then left the aperture and shutter speed where they were, and
changed
> the ISO to 100 (this means the EXACT same exposure on the sensor,
other
> than noise issues). I took another shot. I put the same crop of the
> two RAW (but interpolated within each channel) exposures together,
after
> using Levels in Photoshop to give them the same tonal curve:
>
> http://www.pbase.com/jps_photo/image/40038800
>
> The strap and bag are black; the green cast is because the color
balance
> is the native RAW one, under incandescent light.
Your example is interesting but I am not sure it is showing limits of
the 12 bit A/D, it looks more like noise rather then steps in level,
which is what you would expect from using too few bits.
This does beg the question of whether there is more dynamic range to be
had out of the sensor then canon is managing to get, your test would
indicate that they are losing some of the dynamic range. Most likely
the lost is from noise between the analog amp and the A/D and not the
fact that he converter is only 12 bits.
Scott
Archived from groups: rec.photo.digital (More info?)
In article <UfudndcdXvOYFoffRVn-pw@comcast.com>,
John McWilliams <jpmcw@comcast.net> wrote:
>Chris Brown wrote:
>
>> The problem with doing this is that, in th eabove scenario, the boosted
>> channel will essentially be getting push-processed quite a bit, and that
>> increases noise. For the best results with digital, you want to be using
>> coloured filters, just like the "old-fashioned" way with film. That way, you
>> expose the channels more evenly, and get a cleaner end result.
>
>Do you have any published research that you can share in the NG that
>corroborates the above? It's intuitively correct to me, but I wonder if
>the difference is measurable.
I don't, but it shouldn't be difficult to try for anyone who wants to see if
it does make a useful difference.
Archived from groups: rec.photo.digital (More info?)
Roland Karlsson wrote:
>>You might not
>>realize that photons are merely a collapse of the wave function of
>>light,
>
>
> Yes I do.
>
>
>>and thus have little to do with this discussion.
>
>
> Actually - it has. At low light levels it is more than obvious that
> the notion of photons is important.
>
>
> /Roland
Indeed. The lower the light level the lower the density of electrons
(no. per square mm per sec). At low enough light levels in small enough
pixels the number of electrons does set a quantization. There can be no
fractional number of electrons arriving during the exposure. This
creates the same type of step transfer function that a digitizer does.
Archived from groups: rec.photo.digital (More info?)
"David J. Littleboy" <davidjl@gol.com> writes:
>What might be neat would be an 8MP monochrome sensor in a full-frame
>switchable with the regular 16.7MP Bayer sensor.
Why two different resolutions? That means two different basic sensors,
and thus likely different drive voltages and clock frequencies, a pain
for the camera manufacturer to deal with. Why not use Bayer-filtered
and unfiltered versions of the same sensor, where almost everything will
remain the same?
Dave
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