The Depth-of-Field Quiz for Camera Assistants

Basic Principles

• 1. Which camera or lens setting has no effect on depth-of-field?
• T-Stop
• ISO
• Focal Length
• Focus Distance

• 2. When a point in the subject or scene registers also as a point on film or video, it is referred to as being __________.
• Within the zone
• Within the frame
• Inside the circle of confusion
• In critical focus

• 3. True or false: the size of the finished film or video image (projected, TV, Internet) has an effect on acceptable focus?
• True
• False

• 4. What is the approximate ratio of depth-of-field in front of and behind a subject you are focused on?
• 1/3 in front; 2/3 behind
• 1/2 in front; 1/2 behind
• 2/3 in front; 1/3 behind
• 3/4 in front; 1/4 behind

• 5. What is the closest distance at which the far limit of depth-of-field extends to infinity called?
• Superfocal Distance
• Infinity Range
• Critical Focus
• Hyperfocal Distance

• 6. Stopping down the lens __________ depth-of-field.
• Increases
• Decreases
• Has no effect on

• 7. Opening up the iris of a lens __________ depth-of-field.
• Increases
• Decreases
• Has no effect on

• 8. Getting closer to the subject you're focusing on __________ depth-of-field.
• Increases
• Decreases
• Has no effect on

• 9. Adding a filter in front of the lens without adjusting the exposure __________ depth-of-field.
• Increases
• Decreases
• Has no effect on

• 10. Using a 35mm film camera as opposed to a 16mm film camera for the exact same shot would cause depth-of-field to __________.
• Increase
• Decrease
• Stay the same

Guess the Depth-of-Field

In this section, you are given a situation and must guess the depth-of-field you have. You may assume that the camera is shooting 24 frames-per-second with a 180-degree shutter.

• 11. How much depth-of-field do you have with the settings below?
• 
• 1/2 in. (Half-an-inch)
• 2 in. (Two inches)
• 6 in. (Six inches)
• 15 in. (Fifteen inches)

• 12. How much depth-of-field do you have with the settings below?
• 
• 1 ft. (One foot)
• 3 ft. (Three feet)
• 6 ft. (Six feet)
• 10 ft. (Ten feet)

• 13. How much depth-of-field do you have with the settings below?
• 
• 2 ft. 10 in. (Two feet and ten inches)
• 6 ft. 3 in. (Six feet and three inches)
• 10 ft. (Ten feet)
• 20 ft. (Twenty feet)

• 14. How much depth-of-field do you have with the settings below?
• 
• 1 in. (One inch)
• 3 in. (Three inches)
• 9 in. (Nine inches)
• 12 ft. (Twelve feet)

• 15. How much depth-of-field do you have with the settings below?
• 
• 5 ft. 6 in. (Five feet and six inches)
• 13 ft. 6 in. (Thirteen feet and six inches)
• 50 ft. 3 in. (Fifty feet and three inches)
• Infinity

• 16. How much depth-of-field do you have with the settings below?
• 
• 2 in. (Two inches)
• 10 in. (Ten inches)
• 20 in. (Twenty inches)
• 4 ft. (Four feet)

• 17. How much depth-of-field do you have with the settings below?
• 
• 10 ft. 2 in. (Ten feet and two inches)
• 28 ft. 9 in. (Twenty-eight feet and nine inches)
• 68 ft. 6 in. (Sixty-eight feet and six inches)
• Infinity

• 18. How much depth-of-field do you have with the settings below?
• 
• 12 ft. 6 in. (Twelve feet and six inches)
• 13 ft. (Thirteen feet)
• 13 ft. 6 in. (Thirteen feet and six inches)
• 14 ft. (Fourteen feet)

• 19. How much depth-of-field do you have with the settings below?
• 
• 4 in. (Four inches)
• 4 ft. (Four feet)
• 14 ft. (Fourteen feet)
• 40 ft. (Forty feet)

• 20. How much depth-of-field do you have with the settings below?
• 
• 8 ft. 8 in. (Eight feet and eight inches)
• 18 ft. 8 in. (Eighteen feet and eight inches)
• 88 ft. 8 in. (Eighty-eight feet and eight inches)
• Infinity