The history of the Komura brand lenses is little-known. Information on the company and the lenses it produced is difficult to find online. But, many of the Komura lenses are very good, both in build quality and in optical results!
The company started out with making lenses for Large Format cameras. But in the 1950s they also started manufacturing rangefinder lenses for Leica thread mount cameras, and switched over to making lenses for Nikon rangefinders in the 1960s. Later, they also manufactured enlarging lenses, lenses for various medium format systems and also briefly produced lenses for various models of SLRs. Komura probably was the first brand to build a 1.4/85mm lens in Nikon F mount!
Below is a list of Leica Thread Mount lenses that probably were made by Komura. Some were simply branded as such, but others have different names. Only in the 1960's did Japanese companies start to brand their products, before that they were often sold under the name of the company or retail chain that ordered them from the Japanese factories.
|Brand||Focal length||Max Aperture||Min Aperture||Filter size||Remarks|
|Komura||36mm||1.8||16.0||46mm||Very rare! link to JElabs blog|
|W-Komura-||35mm||2.8||22.0||43mm||focus tab eBay link|
|Asanuma King||35mm||2.8||22.0||43mm||focus tab, identical to the W-Komura- 2.8/35mm but 'zebra' focus ring|
|W-Komura-||35mm||3.5||22.0||43mm||focus tab, identical to the W-Komura- 2.8/35mm design|
|Asanuma King||35mm||3.5||22.0||43mm||focus tab, barrel identical to the Asanuma King 2.8/35mm design|
|Kyoei W.Acall||35mm||3.5||22.0||43mm||no focus tab, coarser knurling, anodized all black barrel|
|W-Komura-||35mm||2.8||22.0||??||example shown online had rear ring of hood attached (no focus tab, six-digit number)|
|W.Honor||35mm||3.5||22.0||34mm||Very rare, design identical to the Acall above. eBay link|
|W-Komura-||35mm||3.5||22.0||34mm||design identical to the Acall above. eBay link|
|W? Telesar||35mm||3.5||22.0||34mm||design identical to the Acall above. Not sure if 'W' is followed by '.' or '-'|
|W.A. Astra||35mm||3.5||22.0||34mm||design identical to the Acall above|
|Force||35mm||3.5||22.0||34mm||design identical to the Acall above|
|Komura||80mm||1.8||22.0||48mm||identical to Acall|
|Sankyo Optical Works Ltd||80mm||3.5||22.0||34mm||fully chrome, four-digit number|
|Sankyo Optical Works Ltd||80mm||3.5||22.0||34mm||chrome and black, 'zebra' focus ring, five-digit number|
|Bittco Super Vemar||135mm||3.5||22.0||48mm||rare|
|Komura||200mm||4.5||22.0||55mm||rare to find with dedicated finder and leather case|
|Komura||400mm||6.3||45.0||67mm||can be split in two halves, barrel is threaded|
Over time, I have owned several Komura and Acall lenses, even briefly owned the 'Force' lens listed above. Some I have shot, others I have only bought and sold. In time, some of the lenses listed here will have their own article in the 'Komura Files' on this website!