2008-02-13, 19:53:18
(Ten post był ostatnio modyfikowany: 2008-02-13, 19:54:29 {2} przez tsz01.)
To znalazlem jako ciekawostke... obliczenia są co prawda dla systemu 4:3, ale myślę że wartości dużo się nie zmienią w systemach 3:2:
Multiply the "equivalent" (or, in case of a 35-mm film camera, actual) focal length (mm) by 0.0352, or, roughly, divide it by 30, and you will see how much (in percent) of your frame will the Moon fill vertically. Here are some examples for the more common focal lengths.
EFL, mm 105 140 200 300 400 600 1000
Vertical frame fill, % 3.7 4.9 7.0 10.6 14.1 21.1 35.2
Note: more exactly, these are values for cameras with a 4:3 image aspect ratio; for those with a 3;2 aspect (35-mm film, most digital SLRs) the values are higher by a factor of about 1.08x; the coefficient value is 0.0381.
Widać więc ze nawet dla ogniskowej 1000mm ksiezyc zajmie tylko ok 35% kadru w pionie
Multiply the "equivalent" (or, in case of a 35-mm film camera, actual) focal length (mm) by 0.0352, or, roughly, divide it by 30, and you will see how much (in percent) of your frame will the Moon fill vertically. Here are some examples for the more common focal lengths.
EFL, mm 105 140 200 300 400 600 1000
Vertical frame fill, % 3.7 4.9 7.0 10.6 14.1 21.1 35.2
Note: more exactly, these are values for cameras with a 4:3 image aspect ratio; for those with a 3;2 aspect (35-mm film, most digital SLRs) the values are higher by a factor of about 1.08x; the coefficient value is 0.0381.
Widać więc ze nawet dla ogniskowej 1000mm ksiezyc zajmie tylko ok 35% kadru w pionie
