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DX Crop Mode Photographic Dynamic Range

bclaff

Vancouver (WA USA not BC Canad, US
9691 posts

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bclaff Awarded for multiple contributions for the Resources Registered since 26th Oct 2004
Fri 24-Feb-12 06:49 AM

I have updated the Photographic Dynamic Range Chart at my site to be interactive.
The old static chart was getting far too cluttered.

This is only the first revision.
Right now it comes up "empty" and you choose the camera model(s) you want to compare.
Feedback is welcome. These revision are a "work in progress".

There is also new data covering the DX Crop Mode of the FX bodies.
This data is relevant because Image Quality (IQ) is reduced when you use DX Crop Mode and print at your usual FX size.

This data is indicated by the DX after the camera model in the chart legend.

The good news is that the "penalty" for using DX Crop Mode is less than the usual quick calculation would predict.

Start geek alert
This is not intuitive and even caught me by surprise but there is a good sound reason for it.
The situation is analogous to the trade-off between raising ISO and "pushing" digitally.
Usually raising ISO produces less additional noise but for some cameras, above a certain ISO, it becomes break-even.
There is a similar relationship for cropping.
Usually letting the camera perform the crop produces less noise than cropping later in post processing.
I'm preparing an article on the subject and will post a link when it is available on my site.
End geek alert



Bill

Visit me at Photons To Photos

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Reply message RE: DX Crop Mode Photographic Dynamic Range
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Reply message No legend shows up in my browser Bill...
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Reply message RE: No legend shows up in my browser Bill...
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     Reply message Life is too short...
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               Reply message SVG, but no, we're Microsoft!
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Reply message RE: DX Crop Mode Photographic Dynamic Range
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Reply message DX Crop Mode Photographic Dynamic Range article
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Reply message RE: DX Crop Mode Photographic Dynamic Range article
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Reply message This makes sense Bill, but...
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     Reply message RE: This makes sense Bill, but...
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          Reply message Speaking of exposure...
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                    Reply message That isn't what I meant by equivalence Bill...
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                              Reply message I muddied the waters with "recovery" Bill...
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