File naming problem 20D

Archived from groups: rec.photo.digital.slr-systems (More info?)

Hi All,

Since I have been using my 70-200 f2.8L IS, on the 20D, I have been getting
something strange. Previous to using this lens, all the images would have
the following naming scheme:

IMG_XXXX.CR2

Now, the the "I" has been dropped, resulting in:

_MG_XXXX.CR2

WTF is going on here?

Cheers
Musty

Archived from groups: rec.photo.digital.slr-systems (More info?)

You're right - and it wasnt by accident. Now that I think back, I made the
switch the day I got the lens. I did this because it was my understanding
that for prints, AdobeRGB is best. Thanks for that!

Musty.

"Geoff Bryant" <geoffbryant@xtra.co.nz> wrote in message
newsUcje.1515$U4.182315@news.xtra.co.nz...
> That usually indicates that you've altered the colorspace. IMG is for the
> sRGB colorspace and _MG indicates Adobe RGB. You may have inadvertently
> switched them somehow.
>
> --
> Geoff Bryant
> www.cfgphoto.com
>
>
> "Musty" <musty@nospam.net> wrote in message
> news:4Pbje.105817$h6.7957@tornado.texas.rr.com...
> > Hi All,
> >
> > Since I have been using my 70-200 f2.8L IS, on the 20D, I have been
> > getting
> > something strange. Previous to using this lens, all the images would
have
> > the following naming scheme:
> >
> > IMG_XXXX.CR2
> >
> > Now, the the "I" has been dropped, resulting in:
> >
> > _MG_XXXX.CR2
> >
> > WTF is going on here?
> >
> > Cheers
> > Musty
> >
> >
>
>

Archived from groups: rec.photo.digital.slr-systems (More info?)

"Ryadia@home" <ryadia@hotmail.com> wrote in message
news:qqgje.8976$E7.4200@news-server.bigpond.net.au...
>
> Adobe RGB is "closer" to the gamut (colour contrast bandwidth) of what a
> printing press can produce.
> Before you begin to shoot in Adobe RGB, ask yourself if your output is
> going to be a photograph or form part of a printed document. If it's going
> to be a photo, stick with sRGB and if you need to, convert it to Adobe RGB
> workspace in Photoshop.
>

It is my understanding from several pro photofinishing shops that the Fuji
Frontiers use the sRGB color space (one even requires files to be submitted
in sRGB format). If you routinely print using these fine machines, then
using sRGB makes sense. It's the camera's native format. Adobe RGB is
Photoshop's native format.

> If you only ever work with photographic prints or inkjet prints, there is
> no value at all in compressing the colour space of your camera to
> accommodate a printing press you probably will never use. If however you
> have one of the new Fuji Xerox photo quality laser printers, Adobe RGB
> will work very nicely with it.
>
> Douglas

From what I've read (and I still have a lot to learn), sRGB is the
"compressed color space" since it has a more limited gamut compared to Adobe
RGB. What's important is that you match the color spaces to what suits you
and the equipment you're using. You'll get better consistency that way.
Personally, I want the widest color gamut available. Photo quality inkjets
are apparently capable of taking advantage of wider gamut, but there are
many factors besides color space which can affect your prints. My biggest
obstacle is getting the prints to match my monitor. :-)

Sonrise

Archived from groups: rec.photo.digital.slr-systems (More info?)

"Musty" <musty@nospam.net> writes:
> "Ryadia@home" <ryadia@hotmail.com> wrote:

>> There is widespread misconception about sRGB and Adobe RGB for
>> photographers.

True.

>> sRGB is the stuff we see on our screen.

That depends on the screen. Yes, cheap monitors (which is what most
people use) usually defaults to something similar to sRGB.
Calibrated, expensive screens made for photo editing can be set up to
work fine with the Adobe RGB colour space. Btw, good monitors usually
have a wider gamut than most printers.

>> Adobe RGB is "closer" to the gamut (colour contrast bandwidth) of
>> what a printing press can produce.

That dependents on the printer. Standard CMYK-printers 4 ink have
very compressed gamut. Printers that use 8 or 16 inks obviously have
a wider gamut.

>> Before you begin to shoot in Adobe RGB, ask yourself if your output
>> is going to be a photograph or form part of a printed document. If
>> it's going to be a photo, stick with sRGB and if you need to,
>> convert it to Adobe RGB workspace in Photoshop.

This is nonsense. The right anser is that if you plan to use a
non-colour-managed workflow, stick with sRGB. If you use colour
management (and know how to do it right), use Adobe RGB.

>> If you only ever work with photographic prints or inkjet prints,
>> there is no value at all in compressing the colour space of your
>> camera to accommodate a printing press you probably will never use.

You've got this backwards. Adobe RGB is a /wider/ colour space than
RGB, not a more compressed one:
http://www.drycreekphoto.com/Learn/color_spaces.htm

>> If however you have one of the new Fuji Xerox photo quality
>> laser printers, Adobe RGB will work very nicely with it.

Or more precisly, if you print at consumer labs such as Costco or
Wal-Mart that uses no colour management, use sRGB. If you use a
professioal lab with colour management, or if you do your own printing
on a qualty printer capable of colour management, you may want to use
Adobe RGB for a wider gamut - which give you access to more vivid,
brighter and also saturated colour.

> Thanks for clearing that up. Looks like I will switch back to sRGB
> (since I shoot in RAW+JPEG, I can always change a photo to AdobeRGB
> later, as you say).

No, you can't. When you shoot in sRGB, you lose some of the colours
that Adobe RGB will record. Once they're gone they're gone - there
is no way to get them back.

However, if you use Adobe RGB, your images will look washed out on a
device that is not colour managed, so you need to convert to sRGB for
putting stuff on the web and for making prints at consumer labs.
--
- gisle hannemyr [ gisle{at}hannemyr.no - http://folk.uio.no/gisle/ ]
------------------------------------------------------------------------
Kodak DCS460, Canon Powershot G5, Olympus 2020Z
------------------------------------------------------------------------

Archived from groups: rec.photo.digital.slr-systems (More info?)

Ryadia@home <ryadia@hotmail.com> wrote:

> "Musty" <musty@nospam.net> wrote in message
> news:C6dje.99670$hu5.52391@tornado.texas.rr.com...
>> You're right - and it wasnt by accident. Now that I think back, I made the
>> switch the day I got the lens. I did this because it was my understanding
>> that for prints, AdobeRGB is best. Thanks for that!
>>
>> Musty.
>>
> Hey Musty...
> There is widespread misconception about sRGB and Adobe RGB for
> photographers. sRGB is the stuff we see on our screen. It originated from
> video cameras and lives on in display monitors and Fuji photo labs.

Kinda sorta. sRGB is based on the primaries of the HDTV system. It
is a good match for many monitors.

> Adobe RGB is "closer" to the gamut (colour contrast bandwidth) of
> what a printing press can produce.

Oh, no. Adobe RGB is far wider than that,

To be clear: Adobe RGB is the wide gamut working space of choice for
many photographers, as it prevents some colours that are fairly common
in real life from being clipped. However, it has the important
disadvantage that it contains some colours that can't be displayed.

> Before you begin to shoot in Adobe RGB, ask yourself if your output
> is going to be a photograph or form part of a printed document. If
> it's going to be a photo, stick with sRGB and if you need to,
> convert it to Adobe RGB workspace in Photoshop.

Too late. The information has already been lost.

Andrew.