Canon's FD ultra-wide — 20mm f/2.8 with Super Spectra Coating for film SLRs.
The Canon FD 20mm f/2.8 S.S.C. is an ultra-wide prime for the Canon FD mount 35mm SLR system. S.S.C. = Super Spectra Coating (Canon's multi-coating). FD mount covers Canon's film SLR era from the early 1970s through 1987. Canon FD mount.
f/2.8 maximum aperture. 20mm focal length (full-frame). S.S.C. Super Spectra Coating (multi-coating). Manual focus. At approximately 340g. 72mm filter thread. Canon FD mount.
S.S.C. was Canon's multi-coating designation for the FD line, providing improved flare resistance vs the earlier S.C. (single-coat) FD lenses. The FD 20mm f/2.8 provides ultra-wide coverage for architecture and landscape. FD lenses are commonly adapted to modern mirrorless cameras.
On the used market the Canon FD 20mm f/2.8 S.S.C. is a classic ultra-wide for Canon FD film cameras or adapted mirrorless use. Condition checks: 72mm front element for marks, aperture blade condition, focus ring damping. Canon FD mount — requires FD-to-mirrorless adapter (no direct FD-to-EF adapter preserving infinity focus exists).