151
5
F
uncti
on Re
ferenc
e
The following equation calculates the aperture value for shooting
distances.
Aperture Value Used F = Guide number ÷ Shooting distance
When sensitivity is [ISO 200] and shooting distance is 5.2 m, aperture
value is:
F = 15.6 ÷ 5.2 = 3
If the resulting number (3, in the above example) is not available as a
lens aperture, the smaller number that is closest (2.8, in the above
example) is generally used.
Calculating Aperture Value from Shooting Distance
Содержание *istDS2
Страница 12: ...Memo 10 ...
Страница 42: ...Memo 40 ...
Страница 108: ...Memo 106 ...
Страница 176: ...Memo 174 ...
Страница 211: ...Memo ...