Multiple choice general knowledge

"Depth of field" refers to

  1. the thickness of the film

  2. the distance from the rear nodal point of the lens and the film plane.

  3. landscape photographs made with a wide angle lens

  4. the areas behind and in front of the point of focus that are also acceptably sharp.
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D Correct answer
Explanation

Depth of field refers to the zone in front of and behind your focused subject that appears acceptably sharp in the final image. A wider aperture (smaller f-number) decreases depth of field, while a smaller aperture (larger f-number) increases it.

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