Canon's FD extreme tele — the 800mm f/5.6 S.S.C. with Super Spectra Coating.
The Canon FD 800mm f/5.6 S.S.C. was a very long supertelephoto prime in the first FD generation, offered from 1976 with Super Spectra Coating. It sat among the longest fixed telephotos in the FD range, built for extreme-reach wildlife and distant sports photography.
This is a manual-focus Canon FD lens with a fixed 800mm focal length and a maximum aperture of f/5.6. It carries Canon's Super Spectra multi-coating and is a large tripod-mounted supertelephoto with focus and aperture set manually on the barrel. The very long focal length demands rock-solid support.
An 800mm f/5.6 provides extreme reach for very distant wildlife and sport, filling the frame with far subjects and compressing perspective heavily. The narrower aperture is typical for such a long lens, and the enormous magnification makes a sturdy tripod and careful technique essential for sharp images.
On the used market the FD 800mm f/5.6 S.S.C. is a rare specialist supertelephoto for dedicated long-lens users. Inspect the large elements for haze, fungus, scratches and separation, confirm smooth aperture and focus operation, and check the tripod foot, hood and drop-in filter holder. It can be adapted to mirrorless with an optics-free FD adapter, though it requires very stable support.