Free Photography Exposure Triangle Mastery Questions and Answers

Question 1

A photographer is capturing a fast-moving cyclist on a bright, sunny day. To freeze the motion of the cyclist and achieve a properly exposed image, which combination of settings is most appropriate?

Accepted Answer

High shutter speed, low ISO, and a moderately small aperture (higher f-stop).

Answer

To freeze a fast-moving subject, a high shutter speed (e.g., 1/1000s) is essential. On a bright, sunny day, the ISO can be kept low (e.g., 100 or 200) to maximize image quality and minimize noise. A moderately small aperture (a higher f-stop number) will ensure sufficient depth of field while balancing the exposure with the fast shutter speed.

Question 2

If a photographer changes their aperture from f/8 to f/4, how must they adjust their shutter speed to maintain the same exposure, assuming ISO remains constant?

Accepted Answer

Increase the shutter speed by two stops (e.g., from 1/125s to 1/500s).

Answer

Changing the aperture from f/8 to f/4 is a two-stop increase in light, as each full f-stop doubles the amount of light entering the lens (f/8 -> f/5.6 -> f/4). To maintain the same exposure, the shutter speed must be increased by two stops to halve the light twice, compensating for the wider aperture.

Question 3

Which of the following is the primary artistic effect controlled by adjusting the aperture setting?

Accepted Answer

Depth of field

Answer

Aperture directly controls the depth of field (DoF), which is the range of distance in a photo that appears acceptably sharp. A wide aperture (low f-stop number) creates a shallow DoF, blurring the background, while a narrow aperture (high f-stop number) creates a deep DoF, keeping more of the scene in focus.

Question 4

A photographer is shooting a landscape at dusk and wants to use a small aperture (f/16) to ensure maximum depth of field. They are using a tripod. To get a correct exposure without introducing excessive noise, what is the best course of action?

Accepted Answer

Use a long shutter speed.

Answer

In low light, a small aperture like f/16 restricts light significantly. To compensate without increasing ISO (which would add noise), the photographer should use a long shutter speed. Since the camera is on a tripod, camera shake from a slow shutter speed is not a concern.

Question 5

Increasing the ISO from 200 to 1600 represents what change in the sensor's sensitivity to light?

Accepted Answer

A three-stop increase

Answer

Each doubling of the ISO number represents a one-stop increase in sensitivity. The progression is 200 -> 400 (1 stop) -> 800 (2 stops) -> 1600 (3 stops). Therefore, changing from ISO 200 to 1600 is a three-stop increase in sensitivity to light.

Photography Practice Test

Photography Practice Test

Free Photography Exposure Triangle Mastery Questions and Answers