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General Photography
Macro
1:1 at f/36 Versus 1:2 at F/8 Cropped
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<blockquote data-quote="Eyelight" data-source="post: 424916" data-attributes="member: 24753"><p>Exactly why the discussion was moved from the Education Forum. Maybe it would be better somewhere else than here, but since it was dealing with macro, here seemed as good as any.</p><p></p><p>I wholeheartedly agree that the proof of anything is in the results.</p><p></p><p></p><p></p><p></p><p>It's math, plain and simple, but it does not work the way you seem to think it does. There are two parts to the close-up DOF calculation. The f/stop affects one part and the magnification affects the other. In order for changing of the two variables to result in the same answer (the same DOF), the new values must go up/down equally. Changing from f/32 to f/8 is 1/4 the value for this part of the formula. Changing from a magnification of 1 to that of .5 results in 3 times the value for this part. 1/4 times 3 does not equal 1.</p><p></p><p>If all this makes the mind groggy, you've read too much and should go shoot some pictures.</p></blockquote><p></p>
[QUOTE="Eyelight, post: 424916, member: 24753"] Exactly why the discussion was moved from the Education Forum. Maybe it would be better somewhere else than here, but since it was dealing with macro, here seemed as good as any. I wholeheartedly agree that the proof of anything is in the results. It's math, plain and simple, but it does not work the way you seem to think it does. There are two parts to the close-up DOF calculation. The f/stop affects one part and the magnification affects the other. In order for changing of the two variables to result in the same answer (the same DOF), the new values must go up/down equally. Changing from f/32 to f/8 is 1/4 the value for this part of the formula. Changing from a magnification of 1 to that of .5 results in 3 times the value for this part. 1/4 times 3 does not equal 1. If all this makes the mind groggy, you've read too much and should go shoot some pictures. [/QUOTE]
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General Photography
Macro
1:1 at f/36 Versus 1:2 at F/8 Cropped
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