Rokuoh - Sha Hexar 20cm. F/3. 5 View Camera Lens RARE
Item History & Price
| Reference Number: Avaluer:43899480 | Brand: Konika |
| Focal Length: 200mm | Type: Telephoto |
| Maximum Aperture: f/3.5 | Mount: Screw Mount |
| Focus Type: Manual |
Rokuoh-sha Hexar 20cm. f/3.5 view camera lens RARE. Based on my research, this lens appears to be pre World War II and is a precursor to "Konica".
From Camera-wiki: "Hexar (ヘキサー) lenses were made by Konica and its predecessors from 1931 onwards. The Hexar were also offered as barrel lenses. At an unknown date, an advertisement was offering the Hexar f/4.5 lenses in four focal lengths: 5cm (¥35), 7.5cm (¥40), 10.5cm (¥53) and 13.5cm (¥80).[9] The 10.5cm a...nd 13.5cm were presented as suitable for general photography and for enlarging purpose, and the 5cm and 7.5cm were presented as enlarging lenses for smaller format negatives.At least one example of the barrel Hexar Ser.1 13.5cm f/4.5 (no.12849) is known complete with its original box, inscribed Hexar 1:4.5 f=13.5cm Rokuoh-sha Tokyo MADE IN JAPAN inside the lid.[10]Other focal lengths are reported, for use on view cameras or large format SLR cameras: 15cm, 18cm, 21cm, 25cm, 30cm and 36cm.[11] Actual examples of the Hexar Ser.1 21cm f/4.5[12] and Hexar Ser.1 25cm f/4.5[13] are confirmed to exist. It is not known if these all-purpose barrel lenses were still offered after World War II, but it is certain that the production of enlarging lenses did continue.".This particular lens is unique in that there is a factory mounted "limiter" which only allows the diaphragm to move between f/3.5 and f/5.6, with diaphragm markings marked as such. The "limiter" is attached with screws and can be removed. I have no idea as to why the "limiter" would have been attached by the factory. In my opinion, the "limiter" suggests that this is NOT an later enlarging lens, which would have been stopped down to achieve even illumination.
The glass elements are very clean. The diaphragm is clean and works smoothly. A small piece of the front barrel metal is missing, but the barrel itself is not compromised nor do the lens elements seem to have been impacted.
" Condition is "Used". Shipped with USPS Priority Mail.
From Camera-wiki: "Hexar (ヘキサー) lenses were made by Konica and its predecessors from 1931 onwards. The Hexar were also offered as barrel lenses. At an unknown date, an advertisement was offering the Hexar f/4.5 lenses in four focal lengths: 5cm (¥35), 7.5cm (¥40), 10.5cm (¥53) and 13.5cm (¥80).[9] The 10.5cm a...nd 13.5cm were presented as suitable for general photography and for enlarging purpose, and the 5cm and 7.5cm were presented as enlarging lenses for smaller format negatives.At least one example of the barrel Hexar Ser.1 13.5cm f/4.5 (no.12849) is known complete with its original box, inscribed Hexar 1:4.5 f=13.5cm Rokuoh-sha Tokyo MADE IN JAPAN inside the lid.[10]Other focal lengths are reported, for use on view cameras or large format SLR cameras: 15cm, 18cm, 21cm, 25cm, 30cm and 36cm.[11] Actual examples of the Hexar Ser.1 21cm f/4.5[12] and Hexar Ser.1 25cm f/4.5[13] are confirmed to exist. It is not known if these all-purpose barrel lenses were still offered after World War II, but it is certain that the production of enlarging lenses did continue.".This particular lens is unique in that there is a factory mounted "limiter" which only allows the diaphragm to move between f/3.5 and f/5.6, with diaphragm markings marked as such. The "limiter" is attached with screws and can be removed. I have no idea as to why the "limiter" would have been attached by the factory. In my opinion, the "limiter" suggests that this is NOT an later enlarging lens, which would have been stopped down to achieve even illumination.
The glass elements are very clean. The diaphragm is clean and works smoothly. A small piece of the front barrel metal is missing, but the barrel itself is not compromised nor do the lens elements seem to have been impacted.
" Condition is "Used". Shipped with USPS Priority Mail.
