A Simple Explanation of Why Aperture Affects Depth of Field

An individual with a beard and glasses is pointing at a diagram of a geometrical shape on a whiteboard. The setup includes red lines and an ellipse. The text "Stearman Press 2025" and a website URL are visible in the corner.

Film photographer and educator Tim Klein’s recent YouTube video explains the tricky concept of exactly why aperture affects your depth of field in a very digestible way.

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