Practice question · Select all that apply
Which of these increase the depth of field in a photograph?
Hints
- Three are decisions at the camera; one is a decision at the enlarger.
- A bigger print demands a smaller circle of confusion.
Show the answer
- A. Closing the aperture from f/4 to f/11
- C. Stepping back from the subject
- D. Changing from an 85 mm lens to a 28 mm lens at the same aperture and distance
Why
The fourth goes the other way and is the one people forget. Enlarging more magnifies the discs of confusion along with everything else, so the acceptable disc on the negative shrinks and the depth of field shrinks with it. Depth of field is a property of the viewing as much as of the taking.
Practise Lenses, Field of View and Depth of Field
The app has 7 more questions on this lesson, and keeps your place in the course. Photography I is free to start.
More questions on Lenses, Field of View and Depth of Field
- A landscape photographer with a 35 mm lens wants everything from a few metres away to the horizon acceptably…
- A 35 mm lens is set to f/8 on the 24 by 36 mm format, with a circle of confusion of 0.03 mm. What is its…
- Sort each focal length by the class it belongs to on the 24 by 36 mm frame.
- Arrange the steps of pre-setting a lens for street work by the hyperfocal method in the order they are…
- A lens is described as 'normal' relative to the format diagonal, not because of an absolute optical constant.…
- The 24 by 36 mm frame is the reference for calling a 50 mm lens normal. What is the diagonal of that frame,…