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Question on depth of field
I have identified 4 things to increase DOF... 1 smaller aperture (higher f/ #) 2 smaller focal length (a 60mm gives more DOF than a 105mm) 3 greater camera to subject distance 4 print smaller or view smaller size Before I continue is this correct? If so, than maybe moving back and getting a smaller image on sensor could be offset by using a high pixel count camera (24 or 36mp) and then cropping out an equivalent picture of say 8mp... In other words, instead of filling the screen with a butterfly, make it less than half or quarter the frame and crop it. Am I missing anything? (assuming I'm happy with an 8mp photo.) Would cropping it up in size change the DOF? (I think it would but I'm wondering if I can win here! With my luck it'll even out.) |
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Question on depth of field
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Question on depth of field
On Tue, 13 Mar 2012 15:34:25 -0500, David Dyer-Bennet wrote:
writes: I have identified 4 things to increase DOF... 1 smaller aperture (higher f/ #) 2 smaller focal length (a 60mm gives more DOF than a 105mm) 3 greater camera to subject distance 4 print smaller or view smaller size Before I continue is this correct? If so, than maybe moving back and getting a smaller image on sensor could be offset by using a high pixel count camera (24 or 36mp) and then cropping out an equivalent picture of say 8mp... In other words, instead of filling the screen with a butterfly, make it less than half or quarter the frame and crop it. Am I missing anything? (assuming I'm happy with an 8mp photo.) Would cropping it up in size change the DOF? (I think it would but I'm wondering if I can win here! With my luck it'll even out.) Yes; filling the partial frame and cropping it later amounts to greater enlargement, so it counts under your #4. Damn! But thanks! |
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Question on depth of field
On Wed, 14 Mar 2012 10:44:58 +1300, Me wrote:
On 13/03/2012 2:58 p.m., wrote: I have identified 4 things to increase DOF... 1 smaller aperture (higher f/ #) 2 smaller focal length (a 60mm gives more DOF than a 105mm) 3 greater camera to subject distance 4 print smaller or view smaller size Before I continue is this correct? If so, than maybe moving back and getting a smaller image on sensor could be offset by using a high pixel count camera (24 or 36mp) and then cropping out an equivalent picture of say 8mp... In other words, instead of filling the screen with a butterfly, make it less than half or quarter the frame and crop it. It won't work. Am I missing anything? (assuming I'm happy with an 8mp photo.) Would cropping it up in size change the DOF? (I think it would but I'm wondering if I can win here! With my luck it'll even out.) There's a method to increase DOF by using multiple exposures focused in appropriate increments and "focus stacking" software to combine the images. Practically limited to static subjects using a tripod and with controlled lighting, but very effective. I knew it... thanks for the tip... I'll have to try that out. |
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