Canon's early Serenar rangefinder wide — 35mm f/3.2 in Leica Thread Mount, manual focus.
The Canon Serenar 35mm f/3.2 is a wide-angle rangefinder lens made in Japan for the 39mm Leica screw thread. It carries the early Serenar brand Canon used on its rangefinder optics around the turn of the 1950s. The slightly unusual f/3.2 maximum aperture marks it as one of Canon's first-generation screw-mount wides 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/3.2. The mount is the 39mm Leica screw thread (LTM / L39 / M39). Focus and aperture are set on the barrel by hand. Details such as element count, weight and filter thread are not stated here because they are not verified from the gap data.
The 35mm angle of view is a natural reportage wide, taking in more than a normal lens while keeping a natural look for street, travel and documentary work. The f/3.2 aperture is modest, so the lens is at its best in daylight. As an early coated optic it benefits from a hood to keep flare in check.
On the used market, inspect these early Serenar lenses carefully for haze, fungus and balsam separation between cemented elements. Check the coatings for cleaning marks and wear, test the aperture blades for oil, and confirm the focus helicoid is smooth. Have the rangefinder coupling checked for accuracy. It adapts well to Leica M via M39-to-M and to mirrorless using M39-to-E, M39-to-Z or M39-to-RF adapters.