Canon's L-series FD long superzoom — the New FD 150-600mm f/5.6L with low-dispersion optics.
The Canon New FD 150-600mm f/5.6L was an L-series long telephoto zoom in the New FD generation, offered from 1982 for the FD manual-focus system. Using low-dispersion optics, it reached from medium telephoto out to an extreme 600mm in one professional-grade lens, an unusual and specialised long zoom.
This is a manual-focus Canon FD lens with a 150-600mm zoom range and a constant maximum aperture of f/5.6 across the range. As an L lens it uses specialised low-dispersion optics to control chromatic aberration at these long focal lengths, and it is a large tripod-mounted lens in the New FD styling with focus, zoom and aperture set manually.
The 150-600mm span reaches from medium telephoto to extreme long telephoto, suiting distant wildlife and field sport in one lens. The constant f/5.6 aperture and L-grade correction keep exposure steady and colour clean across a huge range, while the long reach strongly compresses perspective and demands sturdy support at the telephoto end.
On the used market the New FD 150-600mm f/5.6L is a rare and specialised L long zoom. Check the large complex optics for haze, fungus, scratches and separation, test the zoom and focus for smoothness and any looseness, and confirm the aperture blades are dry. Inspect the tripod collar and hood, and note it adapts to mirrorless via an optics-free FD adapter, though it needs stable support.