Canon Rangefinder (RF) 135mm f/4.0 (1:4 f=13.5cm)
Medium Telephoto lenses - Image Library
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Marketed: March 1948
Optical Construction: 4 elements in 3 groups
Minimum Aperture:- 16
Closest Focusing Distance1.52m
Filter attachement size:- 40mm
Maximum Diameter x Length:- no info; Weigh:- 580g
" ...The trial production of this lens started in 1941. Canon Inc. started as "Seiki Kogaku (Precision mechanics and optics)". This was the first interchangeable lens for Seiki Kogaku and it was advertised in the May 1947 issue of the monthly magazine "Kouga". The focus control system is not coupled to the rangefinder and focus is decided by guess. The original standard bayonet mount was changed to the S mount, before it was marketed as the first interchangeable lens for Seiki Kogaku. This series of lenses were named "Serenar" by a Canon employee in an in-house naming contest. The word "Serenar" was coined from "Serene", the name of the sea on the moon (the Sea of Serenity) and an adjective meaning of "tranquil"" ... Ref; - Canon Museum
NOTE:- MK II model f4/135mm Senenar was marketed from 1948 onwards and were sold overseas with almost same minimum aperture f/16 andf distance scales in feet. 135mm f/3.5 was beginning to sell from 1952 onwards in chrome finish. Black version with revised design was marketed from 1958 onwards.
Seiki-Kogaku (Canon) 13.5cm f4.0 Serenar. Very Early, possibly earliest version
Canon (no Seiki KK) Serenar 4/13.5cm (135mm f/4) with 4 diigit S/N 69xx
Canon Serenar 135mm f/4 MIOJ version with metal (Chrome) rear lens cap
Canon Seiki-Kogaku Serenar 4/13.5cm (135mm f/4); very early Serenar, both original caps, Canon 13.5cm finder, all in matching leather case. Approx. Year: c.1947
Canon Serenar 4/13.5cm (135mm f/4) with "CPO" marking
Tiffin # 603 Adapter ring / Kodak Series 6 metal chrome lens hood for Canon Senenar 135mm f/4
Senenar 135mm f/3.5 telephoto lens
Markedted in 1952. The only 135mm f/3.5 with "Senenar" designation and only in chrome finishes. Later models from here all used "CANON". No image except for this picture deprived from Canon Museum (sorry ..).
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Non-Senenar Canon 135mm f/3.5 lens versions
NOTE:- Basic visual references only for some of the popular series, other combinations/variations may exist.
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