Komura 200mm f/4 (Bronica)
Sankyo Koki · Bronica S · 1965 · 5 elements in 5 groups (air-spaced)
single source, unconfirmedAlso known as: Komura 200mm f/4 Bronica · Komura 200mm F4 for Zenza Bronica · Sankyo Koki Komura 200mm f4 Bronica · Sankyo Kohki Komura 200mm F4 Bronica S2 · Komura 200/4 Bronica · Komura 200mm f/4 for Bronica S2 S2A EC · Zenza Bronica Komura 200mm f4 · コムラー 200mm F4 ブロニカ · 三協光機 コムラー 200mm F4 ゼンザブロニカ用 · コムラー 200mm F4 ゼンザブロニカ
Variants & identification
| Variant | Mount | Years | Serial ranges | Production |
|---|---|---|---|---|
| Komura 200mm f/4 for Zenza Bronica, automatic diaphragm | Bronica S | 1965 | — | — |
- Construction (5 groups, 5 elements), automatic diaphragm and the 67 mm screw-in attachment are from Japanese Wikipedia's Komura list on the ゼンザブロニカ page, the only reference found that lists this lens. camera-wiki's Bronica lens list omits it, giving only the 200mm f/3.5 Komura. The same 5/5 construction and 67 mm thread are given there for the f/3.5, so the two may share a barrel; no source says so.
- Date: no source dates the Bronica Komuras. The year is approximate: Mike Eckman reproduces a 1965 EPOI dealer catalogue of some forty Komura lenses, and the Unihelicoid II mounts of the Komura tele heads exist for the large bayonet introduced with the Bronica C in December 1964, which places the Bronica range in the mid-1960s. Whether the f/4 came before or after the f/3.5 is not recorded.
- Fit: Japanese Wikipedia does not say which of the Bronica's bayonets the 200 mm Komuras use. A 200 mm lens with an automatic diaphragm would be expected on the small front bayonet of the focusing unit, as the 200 mm Nikkor is; sellers offer it for the S2, S2A and EC. Neither point is confirmed by a document read for this page.
How to tell them apart
- Engraved Komura with the Sankyo Koki (Sankyo Kohki) maker's name, 200 mm and 1:4, automatic diaphragm, 67 mm filter thread, on a focal-plane Bronica bayonet
- Two Komura 200 mm lenses exist for the Bronica, f/3.5 and f/4; Japanese Wikipedia gives both as 5-element, 5-group lenses with 67 mm filters, so the engraved aperture is the one sure distinction
- Not the Nikkor-P 200mm f/4 or the Zenzanon MC 200mm f/4 for the same bodies, which carry their own names; not a Komura 200 mm with a 39 mm Unidapter thread, which is a 35 mm-format lens
Komura 200mm f/4 for Zenza Bronica, automatic diaphragm:
- A Komura-badged 200 mm engraved 1:4, with an automatic diaphragm and a 67 mm filter thread, for the focal-plane Bronica (Japanese Wikipedia)
- Komura 200mm f/4 for Zenza Bronica, automatic diaphragm: The one version known, and known from one source: Japanese Wikipedia's Komura list for the Bronica gives 'コムラー200mmF4 - 5群5枚。自動絞り。アタッチメントはφ67mmねじ込み。' and nothing more. camera-wiki's Bronica lens list has only the f/3.5; dealers do offer a Komura 200mm f/4 for the Bronica S2, S2A and EC, so the lens exists, but no document read for this page dates it or says how it differs from the f/3.5 beyond the aperture.
Specifications
- Formula
- 5 elements in 5 groups (air-spaced)
- Construction
- 5 elements / 5 groups
- Aperture range
- f/4
- Filter
- 67 mm
- Years manufactured
- 1965
- Country
- Japan
What reviewers say
No reviews aggregated yet — this family is still in the research queue. Written one? We'd love to index it.
History
The Komura 200mm f/4 is the slower of the two 200 mm lenses that Sankyo Koki offered for the focal-plane Zenza Bronica, and the least documented lens of the Komura Bronica range. Japanese Wikipedia lists it in one line: five elements in five groups, automatic diaphragm, 67 mm screw-in filter thread, the same three figures it gives for the Komura 200mm f/3.5. camera-wiki’s list of Bronica lenses does not have it at all. The lens is nonetheless real: dealers in Japan and Europe offer it as a Komura 200mm f/4 for the Bronica S2, S2A and EC, and it turns up on the used market alongside its f/3.5 sibling.
Everything beyond that is open. No source read for this page gives a launch year, a price, a weight, a closest focusing distance or a reason for a maker to sell two 200 mm lenses of the same construction a half-stop apart; the order in which the pair appeared is not recorded anywhere. The mid-1960s date given here is the date of the Komura Bronica line as a whole, which rests on the 1965 EPOI dealer catalogue that Mike Eckman reproduces and on the Unihelicoid II mounts built for the large bayonet of the Bronica C of December 1964. Which bayonet the 200 mm Komuras use is also unstated, though a 200 mm automatic-diaphragm lens on this camera would be expected on the small front bayonet of the focusing unit.
No review of it has been found. A buyer should treat it as a plain, air-spaced five-element telephoto of unknown reputation, check that the automatic diaphragm works with the body’s release and that the 67 mm thread is clean, and confirm from the engraved aperture whether the lens in hand is the f/4 or the f/3.5, since the two cannot be told apart from Japanese Wikipedia’s figures alone.
This history is AI-written, from the sources listed at the foot of the page. Where the record is silent it says so rather than filling the gap — but no human wrote these sentences.
Example photos
Sample photo wanted — shot with a Komura 200mm f/4 (Bronica)? We'd love to feature it (with credit).
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