Photography I / The Frame: What Is In and What Is Out
Practice question · True or false

Cropping a full 35 mm frame to a square discards one third of the negative area.

Hints
  1. Work out both areas in square millimetres.
  2. Compare 24 by 36 with 24 by 24.
Show the answer

True

Why

True. 24 × 36 = 864 square millimetres; 24 × 24 = 576, which is exactly two thirds of it. The third that goes takes resolution and enlargement quality with it, which is why a square picture is better shot on a square format than rescued from a rectangle.

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