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日期:2026-04-24
Traditional depth-of-field formulas and tables assume equal circles of ... For a
given f-number, increasing the magnification, either by moving closer to the
subject ......
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日期:2026-04-25
1.1 Numerical aperture versus f-number; 1.2 Working (effective) f-number .... The
two equalities in the equation above are each taken by various authors as the ......
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日期:2026-04-23
The f-number (relative aperture) determines the depth of field, and the ..... The
equation for correcting for ISO speed is sometimes shown with a minus sign, and
......
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日期:2026-04-20
The F-number of a lens is also determined by an equation. The F-number is
equal to the focal length of the camera divided by the diameter of its apperature, ......
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日期:2026-04-21
the number of photons reaching the film or sensor. The F-number (also known as
f-stop or aperture value), related to the size of the aperture, is not as simple....
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日期:2026-04-21
4 Oct 2010 ... A sequence is a set of numbers that can be constructed using a formula known
as a recurrence relation. The most obvious of these is the set of ......
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日期:2026-04-25
1 Jul 2012 ... But what is the question here is: Is there any formula that relates all these ...
Depth of field depends on two factors, magnification and f-number....



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