What indicates the size of the aperture opening on a camera?

(A) Auto Focus

(B) F- stop

(C) Shutter

(D) Viewfinder

Correct Ans: (B)

Explanation:
The size of the aperture opening on a camera is indicated by the F-stop. The F-stop (or f-number) represents the ratio of the lens’s focal length to the diameter of the aperture. A smaller F-stop number (e.g., f/2.8) corresponds to a larger, allowing more light to enter, which is ideal for low-light conditions or creating a shallow depth of field. Conversely, a larger F-stop number (e.g., f/16) indicates a smaller, reducing the amount of light entering the lens and increasing the depth of field. The F-stop is crucial in controlling exposure and depth of field in photography.