Budget Canon FD telephoto zoom to 300mm with constant f/5.6, affordable long telephoto reach for FD system shooters.
The Canon FD 100-300mm f/5.6 is a budget telephoto zoom for the Canon FD mount covering from medium to long telephoto focal lengths. The 3x zoom ratio provides useful range from portrait telephoto through to genuine long telephoto for wildlife and sports, all in the Canon FD system.
The 100-300mm range covers serious telephoto territory with the constant f/5.6 aperture simplifying exposure across the zoom range. While the slow aperture limits low-light use, the consistent brightness means no exposure adjustments are needed when zooming — practical for manual exposure film shooting.
Build quality is solid Canon FD with metal construction and smooth zoom and focus mechanisms. The lens is reasonably compact for its focal length range and handles adequately on Canon FD bodies. The constant aperture keeps the barrel diameter moderate for comfortable handling.
The Canon FD 100-300mm f/5.6 offers significant telephoto reach at very low used market prices. For Canon FD shooters who want long telephoto capability without carrying multiple prime lenses, it provides a practical solution at budget pricing.