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TomCurious

Bay Area, US
2352 posts

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"RE: As I recall, Bill Claff's numbers indicate..."

TomCurious Registered since 03rd Jan 2007
Sat 10-Mar-12 12:51 AM

>I know this is hard to believe, but cropping in post may cost
>you up to half of a stop (I'm going from memory here) of DR.

I've never heard of that before. Why would the DR be different between in-camera crop and post processing crop? Can you provide some reference?


>The other thing to bear in mind is that if you know you're
>going to crop you need about 1 stop less DOF, which likely
>means 1 stop lower ISO (again increasing DR).

It is the other way around. The cropped image has less DOF than the uncropped image (at same f-stop, same focal length, same subject distance). If you want to maintain a given DOF, then you will need to stop down the aperture, which usually means higher ISO (if you want to maintain you shutter speed), so less DOF for the cropped image.

Tom
Bay Area Nikonian


http://www.tkphoto.me/

A general, generic topic 800 as DX crop or not [View all] , dhmiller Silver Member Donor Ribbon awarded for his support to the Fundraising Campaign 2014 , Fri 09-Mar-12 04:37 PM
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Reply message RE: 800 as DX crop or not
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Reply message RE: 800 as DX crop or not
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Reply message RE: 800 as DX crop or not
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Reply message RE: 800 as DX crop or not
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     Reply message Sure, viewfinder magnification...
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          Reply message RE: Sure, viewfinder magnification...
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               Reply message True...
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                    Reply message RE: True...
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                         Reply message Well, more or less...
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Reply message As I recall, Bill Claff's numbers indicate...
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Reply message RE: As I recall, Bill Claff's numbers indicate...
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     Reply message RE: As I recall, Bill Claff's numbers indicate...
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     Reply message No, Tom's right about that...
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     Reply message RE: As I recall, Bill Claff's numbers indicate...
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          Reply message You need to be careful here Tom...
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               Reply message RE: You need to be careful here Tom...
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                    Reply message RE: You need to be careful here Tom...
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                         Reply message Well Eric...
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     Reply message Yes, that's right Tom...
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          Reply message RE: Yes, that's right Tom...
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