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日期:2024-05-20
In optics, the f-number (sometimes called focal ratio, f-ratio, f-stop, or relative aperture[1]) of an optical system is the ratio of the lens's focal length to the diameter of the entrance pupil.[2] It is a dimensionless number that is a quantitative mea...
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日期:2024-05-18
On a camera, the aperture setting is usually adjusted in discrete steps, known as f
-stops. Each "stop" is marked with its corresponding f-number, and represents ......
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日期:2024-05-17
10 Jan 2011 ... Before looking at camera controls and camera operation, I want to first re-visit the
concept of f-numbers, f-stops and stops, as an understanding ......
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日期:2024-05-15
From the Fun Fact files, here is a Fun Fact at the Easy level: Fibonacci Number Formula The Fibonacci ......
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日期:2024-05-17
text and numbers formula Abiel, You will need to use two formulas due to nesting limitations. ... ......
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日期:2024-05-20
Numbers for Mac is compatible with Microsoft Excel. Save Numbers spreadsheets as Excel files. Or import ......
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日期:2024-05-15
We can use this to derive the following simpler formula for the n-th Fibonacci number F(n): F(n) = round( ......
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日期:2024-05-20
Binet's formula for the 'n'th Fibonacci number F(n) is given by: (see more below)? Follow publicly Follow ......