Term - Equivalent focal length |
| Equivalent focal length | SWPP Photographic Glossary | Tuesday 1st July 2025 |
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Equivalent focal lengthA 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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Information provided by: SWPP |
