Mamiya 645 AF 55mm f/2.8
Mamiya · Mamiya 645 AF · 1999
Also known as: Mamiya AF 55mm f/2.8 · Mamiya 645AF 55mm f2.8 · Mamiya 645 AF 55mm f/2.8 · Mamiya AF55mm F2.8 · Mamiya 55mm f/2.8 AF · Mamiya 645AFD 55mm · Phase One 55mm f/2.8 AF · マミヤ AF 55mm F2.8 · マミヤ645AF 55mm F2.8 · マミヤ 645 AF 55mm
Variants & identification
| Variant | Mount | Years | Serial ranges | Production |
|---|---|---|---|---|
| Mamiya AF 55mm f/2.8 | Mamiya 645 AF | 1999 | — | — |
- Optical construction, angle of view, minimum aperture, closest focus, magnification, filter size and dimensions are from Mamiya's two 645AF Interchangeable Lenses instruction sheets (cameramanuals.org) and agree with Mamiya Digital Imaging's 645AFD II lens page of 2008. Weight: 442 g on the earlier sheet, 445 g on Mamiya's 2008 page and in the Wikipedia table; the later sheet's figure is illegible in the scan.
- The ¥90,000 price is Mamiya's suggested retail price excluding tax on its 645AFD II lens page, archived April 2008; no launch-year price or dollar list price was found. Popular Photography's April 2000 and October 2002 tests covered the 45, 80, 210, 35 and the two zooms, not the 55.
- The English Wikipedia table lists a '55mm f/2.8 AF D' with the same 7/6 construction, 0.45 m, 58 mm and 445 g as the plain lens. No other source consulted knows a focal-plane 55mm D: Mamiya's 2008 lens page, camera-wiki's autumn 2008 list and the November 2009 Sekor D price list carry only the plain AF 55mm f/2.8, and Mamiya Leaf's 2014 page lists only the leaf-shutter 55mm f/2.8 LS D. The row is recorded here as unconfirmed rather than as a variant.
- The Mamiya Sekor AF 55mm f/2.8 LS D and the Schneider-Kreuznach 55mm f/2.8 LS are leaf-shutter lenses of the 645DF era (7/6, 72 mm filter, 630–660 g by Wikipedia and Mamiya Leaf) and are not on this page.
- No source consulted gives the aperture blade count or a discontinuation date.
How to tell them apart
- AF 55mm f/2.8 on the name ring, no aperture ring, 58 mm filter thread; the manual-focus Sekor C 55mm f/2.8 and 55mm f/2.8 N of the M645 mount have an aperture ring and do not autofocus
- 65.5 mm long, 77 mm across and about 445 g, 7 elements in 6 groups, focusing to 45 cm (Mamiya sheets)
- A 55mm with a leaf shutter, a 72 mm thread and an LS marking is the Schneider-designed 645DF lens
Mamiya AF 55mm f/2.8:
- Name ring reads AF 55mm f/2.8, never with a D; no aperture ring, the aperture being set from the body dial in half stops (Mamiya instruction sheet)
- Mamiya's instruction sheets: 7 elements in 6 groups, 64° angle of view, f/22 minimum, 45 cm closest focus, 0.18× magnification, 58 mm filter, 65.5 mm long, 77 mm diameter; 442 g on the earlier sheet, 445 g on Mamiya's 2008 lens page
- Focus collar slides forward to show the AUTO FOCUS engraving and back for manual focus; the earlier sheet lists a screw-in hood, the later sheet and Mamiya's 2008 page a bayonet hood
- Mamiya AF 55mm f/2.8: One of the five lenses on Mamiya's earliest 645AF lens instruction sheet (with the 45mm, 80mm, ULD 210mm IF and APO 300mm IF), so part of the September 1999 launch line. Mamiya's 2008 lens page describes it as the most natural-looking of the wide-angles, with a floating mechanism to hold edge quality at close range, and sells it at ¥90,000 before tax; camera-wiki's autumn 2008 list and Mamiya Leaf's 2014 page carry it without a D suffix, and dc.watch's November 2008 report on the AF 45mm f/2.8 D, which replaced the plain 45mm, names no 55mm D. Phase One sold the same lens under its own name.
Specifications
- Formula
- 7 elements in 6 groups with a floating element (Mamiya 645AF Interchangeable Lenses instruction sheets; Mamiya's 645AFD II lens page)
- Construction
- 7 elements / 6 groups
- Aperture range
- f/2.8–f/22
- Min. focus
- 0.45 m
- Dimensions
- 77 × 65.5 mm
- Weight
- 445 g
- Filter
- 58 mm
- Years manufactured
- 1999
- Country
- Japan
- Coating
- Multicoated: Mamiya America's lens brochure describes every element as coated with Mamiya's proprietary multi-coating process
- Original price
- ¥90,000 excluding tax (Mamiya's 645AFD II lens page, 2008) (today ¥101,000)
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 AF 55mm f/2.8 is the wide-normal of the Mamiya 645AF line, a 34mm equivalent on 6×4.5 film, and one of the five lenses on Mamiya’s earliest 645AF lens instruction sheet, which puts it in the launch line of September 1999 with the 45mm, 80mm, ULD 210mm IF and APO 300mm IF. Like every lens on this bayonet it has no aperture ring and no focus motor: the body sets the aperture in half stops and drives the focus through a coupling. Mamiya’s sheets give 7 elements in 6 groups, a 64° angle of view, f/22 minimum, 45 cm closest focus for 0.18×, a 58 mm filter thread, and a barrel 65.5 mm long and 77 mm across weighing 442 g on the early sheet and 445 g on Mamiya’s 2008 page. Mamiya’s own description calls it the most natural-drawing of its wide-angles, a standard lens with a wide-angle flavour, and credits a floating mechanism with holding edge quality at close range.
It exists in one version. The earliest sheet gives it a screw-in hood and the later one a bayonet hood, which is the only change found. Camera-wiki’s autumn 2008 list shows it still on sale as the plain AF 55mm f/2.8 at a time when the 28mm, 80mm, 150mm f/2.8 and 75-150mm had D versions, Mamiya’s 2008 lens page prices it at ¥90,000 before tax, and when the Sekor AF 45mm f/2.8 D replaced the plain 45mm in December 2008 no 55mm D was announced with it. The English Wikipedia table does list a 55mm f/2.8 AF D with figures identical to the plain lens, but Mamiya’s own pages, the 2009 Sekor D price list and Mamiya Leaf’s 2014 page do not, so that row is noted rather than taken as a second version. The 55mm that Mamiya Leaf did sell is the Sekor AF 55mm f/2.8 LS D, a leaf-shutter lens designed with Schneider-Kreuznach for the 645DF, with a 72 mm thread and 660 g; it is a different lens.
No bench test or blog review of the 55mm was found: Popular Photography tested the 45, 80 and 210 in April 2000 and the 35 and the zooms in October 2002 and passed over the 55. What can be said from the maker’s figures is that it is the smallest and lightest of the AF wide-angles and focuses as close as the 45mm.
When buying, check the rear electronic contacts for corrosion, that the focus collar clicks between its autofocus and manual positions, and that the body drives it smoothly to 45 cm. The manual-focus Sekor C 55mm f/2.8 and 55mm f/2.8 N of the M645 mount fit the AF bodies only with stop-down metering and are different pages; sellers write AF, 645AF, AFD and Phase One interchangeably, so the name ring decides.
What remains open: the aperture blade count, a launch-year price in yen or dollars, a discontinuation date, and whether the Wikipedia 55mm D row describes anything Mamiya sold.
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 Mamiya 645 AF 55mm f/2.8? We'd love to feature it (with credit).
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