Canon Rangefinder (RF) 135mm f/4.0 (1:4 f=13.5cm)
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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  Seiki-Kogaku (Canon) 13.5cm f4.0 Serenar. Very Early, possibly earliest version
 Seiki-Kogaku (Canon) 13.5cm f4.0 Serenar. Very Early  4 digit serial number

Canon Serenar 4/13.5cm (135mm f/4) with 4 diigit S/N 69xx
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 Serenar 135mm f/4 MIOJ version with metal (Chrome) rear lens cap

Canon Serenar  135mm f/4 MIOJ version with metal (Chrome) rear lens cap
Canon Serenar  135mm f/4 with original lether case and 135mm finder
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 Seiki-Kogaku Serenar  135mm f/4 original caps, Canon 13.5cm finder


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

Canon  Serenar 4/13.5cm (135mm f/4) with
Canon  Serenar 4/13.5cm (135mm f/4) with

Tiffin # 603 Adapter ring / Kodak Series 6 metal chrome lens hood for Canon Senenar 135mm f/4
Kodak Series 6 metal chrome lens hood for Canon Senenar 135mm f/4
Canon Senenar 135mm f/4 front and rear mount
Kodak Series 6 metal chrome lens hood for Canon Senenar 135mm f/4
Tiffin # 603 Adapter ring   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

Canon RF 85mm lens group
Seiki Kogaku Hansa, Model S, J-II camera models

| Leica/Leitz | Contax/Zeiss | Nippon Kogaku-Nikon/Nikkor | Seiki Kogaku/Canon |

NOTE:- Basic visual references only for some of the popular series, other combinations/variations may exist.

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Credit
: All images (lens hood, Optical Finder and rear/side views below) herein courtesy of Mr. Kelvin from his popular gokelvincameras@Ebay Store which retails for many hard-to-find Nikon, canon, Leica, Contax and other collectible oldies. All images Copyright © 2008. All rights reserved.

Credit: Image courtesy of Mr Mike Otto <staff@pacificrimcamera.com> URL: Pacific Rim Camera, who also operates a popular Ebay Store. Image Copyright © 2003. All rights reserved. Pacific Rim camera can also be reached by mail to: Pacific Rim Camera 1965 Davcor St SE Salem, OR 97302 (503) 370-7461 Fax number is (503) 370-8801

Credit: Image courtesy of Mr. Peter Coeln from LEICA Shop®, Austria who also operates a popular Westlicht Auction House. Image Copyright © 2008. All rights reserved. Please respect the visual property of the contributing photographer.


Credit
: Image(s) courtesy of Collectible Cameras®. The company is more well known as another popular RITZ Camera it has a huge inventry for many used collectible equipment of major camera labels. Image copyright © 2008. All rights reserved. Please respect the visual property of the contributing photographer.

Credit: Image(s) courtesy of Rokas Kundrotas®. where he is more well known as maintaining another popular Rokas Photo & Videao @ EBAY with another personal site at www.Kundrotas.com - both kept a huge inventry for many used collectible equipment of major camera labels. Image copyright © 2008. All rights reserved. Please respect the visual property of the contributing photographer.

Credit: Image(s) courtesy of BOB1394@Ebay.com from his EBAY STORE. He also operates an personal section at Lenswork64. Image(s) copyright © 2008. All rights reserved. Please respect the visual property of the contributing photographer.