Canon's New FD tele — the 300mm f/4 in the later black FD styling.
The Canon New FD 300mm f/4 arrived in 1979 as the New FD generation version of Canon's moderate-aperture 300mm telephoto. It brought the standard, non-L 300mm f/4 into the black New FD barrel with the redesigned bayonet mount, serving as an accessible long lens in the FD range.
This is a manual-focus Canon FD lens with a fixed 300mm focal length and a maximum aperture of f/4. It is a tripod-collar telephoto in the New FD styling, with focus and aperture set manually on the barrel. The moderate aperture keeps the lens comparatively light for its reach.
A 300mm f/4 gives useful telephoto reach for wildlife, sport and compressed landscapes while staying more portable than a fast telephoto. Its aperture is well matched to daylight action, and the focal length still allows a subject to stand out against a distant background at moderate cost.
On the used market the New FD 300mm f/4 is a practical and affordable telephoto. Inspect the elements for haze, fungus and separation, confirm the aperture blades are dry, and test the long focus helicoid for smooth travel. Check the tripod collar and built-in hood, and note it adapts to mirrorless via an optics-free FD adapter.