D200 vs D70 Dynamic Range graph

Started Jan 30, 2006 | Discussions
Bill Janes Senior Member • Posts: 1,848
Re: Problems resolved

Julia Borg wrote:

may I ask what was used for lighting?

3200K quarz lights

Sorry, but that answer is wrong. I use 3200K for the reflective target, but for the transmissive I use an old lightbox with 5000K florescent lamps.
I took a picture of the illuminated area to check for uniformity.

any diffusers? was the wedge placed into the window in a black
opaque plate?

I also used DCRaw
with the -h -m -n -3 switches as you suggested and substituted the
green channel into the R and B channels. However, the maximum
density was supoptimal

can you send me the nef?

Certainly. Please post your findings for others to benefit from your experience.

Do you think it is flare or stray light affecting the shadows?

looks like stray light. eliminating it you will probably get more
"high qality" steps resolved. do not know if it is worth any
trouble as essentially the questions are already clearly answered.

-- hide signature --

Bill Janes

Bill Janes Senior Member • Posts: 1,848
Re: Comments anyone?

I posted a lot of good data entailing quite a bit of work and only one comment? Talk about casting pearls!
--
Bill Janes

Jim Kaye Senior Member • Posts: 2,794
Comment and question

Your summary log-log plot seems to indicate that ACR produces higher pixel values in the darker areas of a raw image than NC does. To my eye, ACR at default settings produces images with better detail in shadow areas than NC (assuming low ISO and therefore low noise levels), which seems consistent with the data presented.

Is that a correct interpretation of the information you have summarized?

(I know this is only indirectly related to the question of DR.)
--
Jim Kaye

'I believe that the electronic image will be the next major advance. Such systems will have their own inherent and inescapable structural characteristics, and the artist and functional practitioner will again strive to comprehend and control them.' -- Ansel Adams, 1981

 Jim Kaye's gear list:Jim Kaye's gear list
Nikon D750 Nikon D7500 Nikon D810 Nikon D500 Fujifilm X-Pro2 +2 more
Led566 Regular Member • Posts: 450
Re: Comments anyone?

Bill Janes wrote:

I posted a lot of good data entailing quite a bit of work and only
one comment? Talk about casting pearls!
--
Bill Janes

Very good work indeed, thanks for sharing it.

Unfortunately it is buried in this somewhat old thread, maybe it's worth to start another one...

Steve Bingham
Steve Bingham Forum Pro • Posts: 26,298
Bill

I agree. A lot of work!!!! 9.27 stops with a RMS of 1.0 is pretty exciting! I suspect the noise figure at 12.3 stops might approach RMS of somewhere between 3 and 4???

Lastly, a question. Would you mind if I put this data on my web page? Last month I got 2.8 million hits so I am sure it would get read by quite a few interested photographers over a years time. Of course I would give you full credit.
--
Steve Bingham
http://www.dustylens.com

 Steve Bingham's gear list:Steve Bingham's gear list
Nikon D810 Nikon D7200 Nikon AF Nikkor 85mm f/1.8D Nikon AF-S DX Nikkor 18-140mm F3.5-5.6G ED VR Nikon AF-S DX Nikkor 16-80mm F2.8-4E ED VR +20 more
Bill Janes Senior Member • Posts: 1,848
Re: Comment and question

Jim Kaye wrote:

Your summary log-log plot seems to indicate that ACR produces
higher pixel values in the darker areas of a raw image than NC
does. To my eye, ACR at default settings produces images with
better detail in shadow areas than NC (assuming low ISO and
therefore low noise levels), which seems consistent with the data
presented.

Is that a correct interpretation of the information you have
summarized?

(I know this is only indirectly related to the question of DR.)
--
Jim Kaye

'I believe that the electronic image will be the next major
advance. Such systems will have their own inherent and inescapable
structural characteristics, and the artist and functional
practitioner will again strive to comprehend and control them.' --
Ansel Adams, 1981

Jim,

Yes, I think that your intrepretation is correct. The default curve of Nikon Capture rolls off the shadow tones faster than ACR. For those making prints, what does this mean? A good print has a contrast ratio of 100:1 or 6.6 stops. If you lower the contrast so the entire range can be printed, the midtones will be flat. You can apply an S curve to roll off the highlights and shadows or simply lopp of the shadows if they contain little detail and much noise. I can't really say that one converter produces better results than the other in high contrast situations.

BTW, a great quote from Adams.
--
Bill Janes

Bill Janes Senior Member • Posts: 1,848
Re: Bill

Steve Bingham wrote:

I agree. A lot of work!!!! 9.27 stops with a RMS of 1.0 is pretty
exciting! I suspect the noise figure at 12.3 stops might approach
RMS of somewhere between 3 and 4???

Lastly, a question. Would you mind if I put this data on my web
page? Last month I got 2.8 million hits so I am sure it would get
read by quite a few interested photographers over a years time. Of
course I would give you full credit.
--
Steve Bingham
http://www.dustylens.com

Steve,

By all means feel free to post the material on your site, which is a great piece of work.
--
Bill Janes

Steve Bingham
Steve Bingham Forum Pro • Posts: 26,298
Re: Bill

Thanks, Bill. I will make it part of a D200 information page. Probably take 3-4 days to do it right.
--
Steve Bingham
http://www.dustylens.com

 Steve Bingham's gear list:Steve Bingham's gear list
Nikon D810 Nikon D7200 Nikon AF Nikkor 85mm f/1.8D Nikon AF-S DX Nikkor 18-140mm F3.5-5.6G ED VR Nikon AF-S DX Nikkor 16-80mm F2.8-4E ED VR +20 more
Jim Kaye Senior Member • Posts: 2,794
Thanks for the reply, Bill...

and to you and others for putting in the effort to run all these tests.

Yeah, I think Adam would really enjoy all this. He certainly understood how to make the most of the available ranges of contrast in his film and photographic paper, and our digital tools make maximizing DR so much easier in many ways (though still demanding thought, skill, and experience).
--
Jim Kaye

 Jim Kaye's gear list:Jim Kaye's gear list
Nikon D750 Nikon D7500 Nikon D810 Nikon D500 Fujifilm X-Pro2 +2 more
Bill Janes Senior Member • Posts: 1,848
Re: Bill

Steve Bingham wrote:

Thanks, Bill. I will make it part of a D200 information page.
Probably take 3-4 days to do it right.
--
Steve Bingham
http://www.dustylens.com

Steve,

I look forward to veiwing your D200 information page. You might also want to take a look at this post. Feel free to make use of it also.

\ http://forums.dpreview.com/forums/readflat.asp?forum=1021&message=17137749
--
Bill Janes

ErikaG Regular Member • Posts: 104
Re: Bill

Thanks Folks. This thread is very informative!

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