Canon's FD-mount 135mm telephoto — breech-lock version with good optics for film portrait work.
The Canon FD 135mm f/2.5 is a manual-focus telephoto prime for Canon's FD-mount film SLRs in the breech-lock version. The 135mm provides classic portrait compression, and f/2.5 is relatively fast for this focal length.
Optically good — sharp from f/4 with pleasant rendering for portraits. The f/2.5 aperture provides more subject separation than f/3.5 alternatives. SC (Spectra Coating) or SSC (Super Spectra Coating) depending on version. Manual focus with smooth helicoid.
Canon FD breech-lock mount. 55mm filter thread. Compact and lightweight for 135mm. Manual focus and aperture. Metal construction. Full-frame film coverage. The breech-lock mount is distinctive — twist the chrome ring to lock.
Available used very cheaply. Adapts to mirrorless cameras via simple adapters — does NOT adapt well to Canon EOS. The FD 135mm f/2 is faster and more desirable. SSC versions preferred over SC for better coating. For film FD shooters or mirrorless adapter enthusiasts.