Photographic term Equivalent focal length  SWPPMaster Location Lighting

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Term - Equivalent focal length

Equivalent focal length SWPP Photographic Glossary

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Equivalent focal length

A distance in a lens between the front nodal point and the focal plane when the lens is set to focus a subject at infinity. In a telephoto lens the equivalent focal length is shorter than the back focus. The reverse is true in a wide angle lens.


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