Canon's compact rangefinder wide — 35mm f/3.5 in Leica Thread Mount, manual focus.
The Canon 35mm f/3.5 is a compact wide-angle rangefinder lens made in Japan for the 39mm Leica screw thread. It comes from Canon's rangefinder lens line, which by the later 1950s carried the Canon name rather than the earlier Serenar branding. This slower 35mm gave buyers a small, affordable wide for Leica-thread and Canon rangefinder bodies.
This is a manual-focus, rangefinder-coupled Leica Thread Mount lens with a 35mm focal length and a maximum aperture of f/3.5. The mount is the 39mm Leica screw thread (LTM / L39 / M39). Aperture and focus are set by hand on the barrel. Element count, weight and filter thread are omitted here to avoid guessing beyond the verified data.
The 35mm view is a versatile general-purpose wide for street, travel and everyday shooting, wider than normal but without heavy distortion. The modest f/3.5 aperture keeps the barrel small and light, which suits it to compact carry. It performs best in good light and gains contrast and corner sharpness on stopping down.
Buying used, examine the glass for haze and fungus and the cemented groups for separation (balsam). Check coatings for cleaning marks and wear, look for oil on the aperture blades, and confirm the focus helicoid moves smoothly. Test rangefinder-coupling accuracy before purchase. The lens adapts well to Leica M with an M39-to-M adapter and to mirrorless via M39-to-E, M39-to-Z or M39-to-RF adapters.