The exposure time of a camera lens at the `(f)/(2.8)` setting is `(1)/(200) ` second. The correct time of exposure at `(f)/(5.6)` is

With diaphragm of the camera lens set at (f)/(2) , the correct exposure time is (1)/(100) , then with diaphragm set at (f)/(4) . Calculate the correct exposure time.

With diaphragm of the camera lens set at (f)/(2) , the correct exposure time is (1)/(100) , then with diaphragm set at (f)/(4) . Calculate the correct exposure time.

With diaphragm of the camera lens set at (f)/(2) , the correct exposure time is (1)/(100) , then with diaphragm set at (f)/(4) . Calculate the correct exposure time.

Aperture of lens of a camera is f and its exposure time is (1)/(60) s. If aperture becomes 1.4 f, then what will be the exposure time ?

If the aperture of a camera is halved then for the given illumination of the object the exposure time should :

A satisfactory photographic print is obtained when the exposure time is 10 sec at a distance of 2m from a 60 cd lamp. The time of exposure required for the same quality print at a distance of 4m from a 120 cd lamp is

The camera lens has an aperture of f and the exposure time is (1/60)s. What will be the new exposure time if the aperture become 1.4f ?

The camera lens has an aperture of f and the exposure time is (1/60)s. What will be the new exposure time if the aperture become 1.4f ?