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MTF charts for Nikkor lenses

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Anonymous

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

>... I can't read Japanese so can't tell you which link to click on
>http://www.nikon-image.com/jpn/products/lens/af/index.h...

By blindly clicking I can see that on this first page the 2nd grouping
with the lens front showing has four links to different classes of
lenses, click on the bottom right link takes you to telephotos, click
on one of them (say the 500) takes you to a page like this, with the
MTF charts at the bottom of the sheet ...
http://www.nikon-image.com/jpn/products/lens/af/singlef...

Bill

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

Bill Hilton wrote:
"By blindly clicking I can see that on this first page the 2nd grouping

with the lens front showing has four links to different classes of
lenses, click on the bottom right link takes you to telephotos, click
on one of them (say the 500) takes you to a page like this, with the
MTF charts at the bottom of the sheet ...
http://www.nikon-image.com/jpn/products/lens/af/singlef......
"

Nikon seems to be just as bad as Canon in publishing MTF charts that
violate physics! For example, the 500mm chart that you mention has
most of the curves starting out at an MTF value of 1.0. This is
impossible for an f/4 lens, and it makes one wonder just where they are
getting their data from.

I've always liked the Photodo data much better since it is actual
measured data that makes sense. Photodo also provides curves both for
wide open and at f/8, which allows you to deduce extremely useful
information about color fringing and other particular aberrations. Its
too bad that Photodo is all but dead!

Brian
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Anonymous

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

frederick wrote:
> Christopher Yeung wrote:
>> Can anyone point me to websites that show MTF charts for Nikkor
>> lenses please?
> http://www.photodo.com/
> Not complete, but many new and old favourites are rated from most
> makers.

Which are the "new" ones? My random selection didn't come up with any.

--
Frank ess

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

Frank ess wrote:
> frederick wrote:
>
>> Christopher Yeung wrote:
>>
>>> Can anyone point me to websites that show MTF charts for Nikkor
>>> lenses please?
>>
>> http://www.photodo.com/
>> Not complete, but many new and old favourites are rated from most
>> makers.
>
>
> Which are the "new" ones? My random selection didn't come up with any.
>
Anything later than an AI-s is new to me....
Anonymous

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

"frederick" <lost@sea.co.zn> wrote in message
news:1124168409.751356@ftpsrv1...
> Frank ess wrote:
> > frederick wrote:
> >
> >> Christopher Yeung wrote:
> >>
> >>> Can anyone point me to websites that show MTF charts for Nikkor
> >>> lenses please?
> >>
> >> http://www.photodo.com/
> >> Not complete, but many new and old favourites are rated from most
> >> makers.
> >
> >
> > Which are the "new" ones? My random selection didn't come up with any.
> >
> Anything later than an AI-s is new to me....

Last time I was on photodo, It seemed they have stopped actively testing
lenses. I've not seen much of anything new in years.
-S
Anonymous

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

I have already download most of the MTF charts from this Japanese site and I
have merged in a word doc the charts for the 34 more popular lenses. The doc
is 260 kb and if you give me a binaries newsgoup that I can access, I can
upload it there.
--
Dimitris M


>
> >... I can't read Japanese so can't tell you which link to click on

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

On 16 Aug 2005 09:29:32 -0700, "Bill Hilton" <bhilton665@aol.com> wrote:

>> Can anyone point me to websites that show MTF charts for Nikkor
>>lenses please?
>
>Supposedly available on this Nikon Japanese site but I can't read
>Japanese so can't tell you which link to click on ... maybe someone can
>tell us which link to use for MTF charts?
>
>http://www.nikon-image.com/jpn/products/lens/af/index.h...

Try this instead.
http://babelfish.altavista.com/babelfish/trurl_pagecont...

It's not the best, as the headings & menu items are images, rather than
translatable text. However, it's a little easier this way, as you do get some
english. The url goes to AF lenses, so you can just click on Wide, Standard or
Tele from there. If you look on the left, you'll see DX, AF, MF, so you can
click on the lens technology(?) there.

The translation isn't perfect, but it should be understandable.

- ---
Norman
Please reply via group. E-mail ID does not exist.
Anonymous

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

"Bill Hilton" <bhilton665@aol.com> wrote:
>> Can anyone point me to websites that show MTF charts for Nikkor
>>lenses please?
>
> Supposedly available on this Nikon Japanese site but I can't read
> Japanese so can't tell you which link to click on ... maybe someone can
> tell us which link to use for MTF charts?
>
> http://www.nikon-image.com/jpn/products/lens/af/index.h...

You found it. Just click through to the lens you want to see. The MTF chart
is at the bottom of the page. (They only give the MTF wide open, something
one sees surprisingly often in Japanese tech literature.)

http://www.nikon-image.com/jpn/products/lens/af/zoom/wi...
http://www.nikon-image.com/jpn/products/lens/af/singlef...
http://www.nikon-image.com/jpn/products/lens/af/singlef...

OK, here's what gives at the index page. There are three groups, the top one
has three small bullets, the second one has four small bullets, the third
one has one small bullet.

The top is AF zoom lenses, the middle is AF fixed-focus lenses, and the
bottom is teleconverters. The bullets are arranged as follows.

Zoom:
-> Wide -> Standard
-> Tele
Fixed:
-> Wide -> Standard
-> Tele -> Supertele

When you click the bullet, you'll see the names of the lenses in an alphabet
you can read.

David J. Littleboy
Tokyo, Japan
Anonymous

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

"David J Taylor"
<david-taylor@blueyonder.co.not-this-bit.nor-this-part.uk.invalid> wrote in
message news:l2uMe.90385$G8.54415@text.news.blueyonder.co.uk...
> David J. Littleboy wrote:
> []
>>> http://www.nikon-image.com/jpn/products/lens/af/index.h...
>>
>> You found it. Just click through to the lens you want to see. The MTF
>> chart is at the bottom of the page. (They only give the MTF wide
>> open, something one sees surprisingly often in Japanese tech
>> literature.)
>
> Are these theoretical or measured MTFs?

(Obigatory quibble: You mean "Are those _calculated from the design_ or
measured MTFs?")

It doesn't say.

David J. Littleboy
Tokyo, Japan
Anonymous

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

David J. Littleboy wrote:
> "David J Taylor"
[]
>> Are these theoretical or measured MTFs?
>
> (Obigatory quibble: You mean "Are those _calculated from the design_
> or measured MTFs?")
>
> It doesn't say.
>
> David J. Littleboy
> Tokyo, Japan

theoretical - "Describing an idea which is part of a theory, or a
consequence derived from theory." (from:
http://www.lhup.edu/~dsimanek/glossary.htm). So I reckon if you design
something, and optical theory is part of that design process, then what
you get is a theoretical MTF.

I would be quite happy with the word "predicted" though.

I would guess that both Canon's and Nikon's MTF data is "predicted", and
that they will have some production limits against which a sample or
production units are tested.

Cheers,
David
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