Adjusting The diaphragm of the camera lens does what?

A. Advances the film
B. Changed the speed of the film
C. changes the size of the aperture
D. focuses the image


please people who know answer this. not trying to be rude or anything. :-)

The diaphram or iris is one of the things that controls the amount of light entering the camera through the lens (the others are the shutter and filters), so it changes the size of the aperture.

A. is the film advance mechanism, B is usually the metering control and D is the focus ring (or autofocus mechanism).

The correct answer is C.

c

Can I phone a friend?

C. The diaphragm is also called the iris and controls the size of the aperture of the lens.