Understand the physics.
Make better choices.

Detailed, illustrated guides that connect technical principles with decisions you can use in practice.

PhotographyOpticsPractical guides

Four-panel illustration of 30mm and 50mm lenses at f/1.8 and f/3.5

Photography • Beginner to professional

Camera and lenses explained: from beginner to professional

Understand 30mm vs 50mm, f/1.8 vs f/3.5 and the physics of focus, then choose a camera and lens system for the photographs and professional work you want to make.

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Understand the physics.Make better choices.

Camera and lenses explained: from beginner to professional

Understand the physics.
Make better choices.