Question

choose the proper f - stop for this aperture. what happens to the light when you \close\ the aperture 1 stop? f/1.4 f/8 f/4 f/16 quadruple the light double the light triple the light 1/2 the light

Explanation:

The F - stop value on the lens is marked as 1:1.8, so the proper F - stop for this aperture is the closest available option which is f/1.4. When you "close" the aperture 1 stop, you are reducing the amount of light that enters the camera. Each stop change halves or doubles the light. Closing the aperture 1 stop means reducing the light, so it is 1/2 the light.

Answer:

1. A. f/1.4
2. D. 1/2 the light