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 of acceptable sharpness in front of and behind the point of focus. A deep depth of field (f/16) keeps everything sharp, while shallow depth of field (f/2.8) keeps only the subject sharp with blurred background.

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