Photography Exposure Triangle Mastery 4

Question 1

What is the 'exposure value' (EV) concept used for?

Accepted Answer

Expressing the combined effect of aperture and shutter speed as a single number

Answer

EV combines aperture and shutter speed into one number representing a given luminance level, independent of ISO.

Question 2

A photographer shoots at 1/200s, f/5.6, ISO 400. They want to use 1/800s instead. What aperture maintains the same exposure?

Accepted Answer

f/2.8

Answer

Increasing shutter speed from 1/200s to 1/800s is two stops less light, so aperture must open two stops from f/5.6 to f/2.8.

Question 3

Which scenario best demonstrates the trade-off between ISO and image quality?

Accepted Answer

ISO 6400 in dim light producing grainy, noisy images

Answer

High ISO like 6400 amplifies the sensor signal along with noise, producing graininess that reduces image quality.

Question 4

When shooting star trails at night, which shutter speed approach is correct?

Accepted Answer

Several minutes to capture star arc movement

Answer

Star trails require exposures of many minutes so the Earth's rotation visibly moves stars across the frame as light streaks.

Question 5

A landscape photographer wants maximum sharpness front-to-back and minimal noise. Which settings best achieve this?

Accepted Answer

f/11, ISO 100, tripod with slow shutter

Answer

f/11 provides deep depth of field, ISO 100 minimizes noise, and a tripod allows a slow shutter to maintain proper exposure.

Photography Practice Test