Zenzanon Macro 100mm f/4 (ETR)
Zenza Bronica · Bronica ETR · 1981
single source, unconfirmedAlso known as: Bronica ETR 100mm f/4 Macro · Bronica ETRS 100mm F4 Macro · Zenzanon-E 100mm f/4 Macro · Zenzanon E 100mm F4 Macro · Zenzanon-PE Macro 100mm f/4 · Zenzanon PE 100mm F4 Macro · Macro Zenzanon PE 100mm f4 · Bronica 100mm f/4 Macro lens for ETR · ゼンザブロニカ ゼンザノン PE マクロ 100mm F4 · ゼンザノン E 100mm F4 マクロ · ブロニカ ETR 100mm F4 マクロ
Variants & identification
| Variant | Mount | Years | Serial ranges | Production |
|---|---|---|---|---|
| Zenzanon-E 100mm f/4 Macro | Bronica ETR | — | — | — |
| Zenzanon-PE Macro 100mm f/4 | Bronica ETR | — | — | — |
- Element and group count, 0.61 m closest focus and 62 mm filter are Japanese Wikipedia's figures for the PE Macro, citing カメラ年鑑'98 p.323. Whether the E version shares the formula is not documented: a Photrio post reached only through a search excerpt (the thread refused a direct fetch) says the PE is optically the same lens, which is plausible for a badge-and-coating generation change but unverified. No weight was found for either version.
- The year is a floor: an E-badged lens exists, so the design predates the PE line of 1988, and the E badge belongs to the lenses of about 1980–81 onward; the earliest dated listing actually found is カメラ年鑑'98. It is not in the 1976 manual's lens table.
- Magnification at 0.61 m is not stated by any source; a 100 mm lens focusing to 0.61 m from the film is in the region of 1:3 to 1:2, and Bronica's extension tubes take it closer. The PE 105mm f/4.5 that replaced it reaches 1:1 unaided.
How to tell them apart
- The macro that is not the 1:1 lens: a 62 mm filter and 0.61 m closest focus, against the 105mm f/4.5 Macro's 67 mm thread, 0.35 m and 920 g. Not the non-macro Zenzanon MC/E 105mm f/3.5 either
- A Bronica four-claw ETR bayonet with a Seiko #0 leaf shutter inside the lens, mounting only with the shutter cocked; fits every ETR body from 1976 to 2004 and nothing else. Not the Zenzanon-S/PS Macro 110mm f/4 of the SQ, the Zenzanon-PG 100mm f/3.5 of the GS-1 or the Zenzanon 100mm f/2.8 of the focal-plane Bronica S2/EC
Zenzanon-E 100mm f/4 Macro:
- Badged Zenzanon-E, with whole-stop aperture clicks and a 62 mm filter (KEH listing title; the half stops belong to the PE)
Zenzanon-PE Macro 100mm f/4:
- Badged Zenzanon-PE Macro, half-stop aperture clicks; 6 elements in 4 groups, 0.61 m closest focus, 62 mm filter (Japanese Wikipedia, citing カメラ年鑑'98)
- Zenzanon-E 100mm f/4 Macro: Known from dealer listings: KEH sells it as the Zenzanon-E 100mm f/4 Macro for the ETR system, in a 62 mm filter size. No catalogue, manual or yearbook listing of the E version was found, so its formula and weight are unrecorded here.
- Zenzanon-PE Macro 100mm f/4: Listed in カメラ年鑑'98 but absent from Tamron USA's 2004 lens list, which carries the PE 105mm f/4.5 1:1 macro instead; the 100 was dropped before the end of production.
Specifications
- Formula
- 6 elements in 4 groups (PE version, カメラ年鑑'98 via Japanese Wikipedia); the E version's formula is not published
- Construction
- 6 elements / 4 groups
- Aperture range
- f/4
- Shutter
- Seiko #0 electronically controlled between-lens leaf shutter, 8s–1/500 and T (B on the ETRSi), mechanical 1/500 without a battery; speeds set on the body
- Min. focus
- 0.61 m
- Filter
- 62 mm
- 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 100mm f/4 Macro is the Bronica ETR system’s first close-focusing lens, a flat-field macro of moderate focal length that sat beside the non-macro 105mm f/3.5 in the E-series years and was itself superseded by the 1:1 Zenzanon-PE 105mm f/4.5. It exists in two badges: a Zenzanon-E, known here only from dealer stock (KEH lists it as the Zenzanon-E 100mm f/4 Macro for the ETR system in a 62 mm filter size), and the Zenzanon-PE Macro 100mm f/4 of the ETRSi era, for which Japanese Wikipedia gives six elements in four groups, closest focus of 0.61 m and a 62 mm filter, citing カメラ年鑑’98. A forum post holds the two to be the same optics under different badges, which fits the way the PE generation handled the other primes but is not confirmed by any catalogue; the E version’s formula and weight were not found in print.
Mechanically it is an ordinary ETR lens: a Seiko #0 electronically controlled between-lens shutter timed by the body from 8 s to 1/500 with T (B on the ETRSi), mechanical 1/500 without a battery, mounting only when cocked. The PE version adds half-stop aperture clicks. At 0.61 m from the film a 100 mm lens is in the region of 1:3 to 1:2, so the lens needs Bronica’s extension tubes for life-size work, which is the gap the 920 g PE 105mm f/4.5 later filled with 1:1 unaided; the 100 is the lighter lens of the two and takes the ordinary 62 mm filters of the ETR primes rather than the 105’s 67 mm.
The 100 was still listed in カメラ年鑑’98 but is absent from Tamron USA’s 2004 price list, which carries the 105 macro instead, so it was dropped in Bronica’s last years. No review of it was found. Its dates are poorly recorded: the E badge places the design in the 1980s, before the PE line of 1988, but the earliest dated listing actually found is the 1998 yearbook, and the lens is not in the 1976 manual. Left open: the launch year, the E version’s formula and weight, the magnification at closest focus, the blade count, and any serial-number information.
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 Zenzanon Macro 100mm f/4 (ETR)? We'd love to feature it (with credit).
Live listings
- Bronica 100mm f/4 Macro Zenzanon-E L#10102267
- 【2308】ZENZA BRONICA ゼンザブロニカ Macro ZENZANON-E 100mm f/4
- ZENZA BRONICA MACRO ZENZANON-PE 100mm F4
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