Timeline for Automatic Depth-of-Field in modern cameras?
Current License: CC BY-SA 3.0
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| Oct 22, 2015 at 20:54 | comment | added | Alan Marcus | We make some assumptions; after all, DOF is subjective. A 16 x 20 is likely placed on the wall and viewed from 25 inches (635mm). The magnification used to make = 17X. Assume a 50mm using the 1/000 rule of thumb = 0.05mm at focal plane X 17 = 0.85mm on the print. A circle viewed from 635mm must be 635 ÷ 1000 = 0.635mm or less (fails test). How about using 1/5000 of the focal length? 50 ÷ 1500 = 0.333mm at focal plane X 17 = 0.57mm (meets requirements). | |
| Oct 22, 2015 at 17:42 | comment | added | Michael C | 1/1000 of focal length still assumes an 8x10 viewed at 12 inches. The same image enlarged to 16x20 will have a shallower DoF. The same image viewed at 4x6 will have deeper DoF. (Assuming the same viewing distance) | |
| Oct 22, 2015 at 3:31 | history | edited | user13451 | CC BY-SA 3.0 |
Line feed to engage numbered list markdown. Remove tagline (see http://meta.stackexchange.com/q/2950/213963 )
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| Oct 21, 2015 at 22:51 | history | answered | Alan Marcus | CC BY-SA 3.0 |