Glass Bodies a variant-level encyclopedia of vintage lenses and cameras by iwillpat

Mamiya 645 AF 80mm f/2.8

Mamiya · Mamiya 645 AF · 1999

single source, unconfirmed

Also known as: Mamiya AF 80mm f/2.8 · Mamiya 645AF 80mm f2.8 · Mamiya 645 AF 80mm f/2.8 · Mamiya AF80mm F2.8 · Mamiya Sekor AF 80mm f/2.8 D · Mamiya 80mm f2.8 D · Mamiya 645AFD 80mm · Phase One 80mm f/2.8 D · マミヤ AF 80mm F2.8 · マミヤ645AF 80mm F2.8 · マミヤ セコール AF 80mm F2.8 D

Variants & identification

Variant Mount Years Serial ranges Production
Mamiya AF 80mm f/2.8 (1999 original) Mamiya 645 AF 1999 — —
Mamiya Sekor AF 80mm f/2.8 D Mamiya 645 AF — — —
  1. Element count, angle of view, closest focus, magnification, filter size, dimensions and weight for the original lens are from Mamiya's 645AF Interchangeable Lenses instruction sheet (cameramanuals.org); the D lens's figures are from the Wikipedia lens table, which is the only source consulted that tabulates it.
  2. The D lens's 67 mm filter thread and 330 g come from the Wikipedia table and KEH's listing; Mamiya's own sheet for the D was not found. Michael Nguyen's AFD review gives 58 mm for his plain AF 80mm, which matches Mamiya's sheet.
  3. No source consulted gives the aperture blade count, a list price, or the year the D version replaced the original; camera-wiki lists both on sale in autumn 2008.
  4. The Mamiya 80mm f/2.8 LS D and Schneider-Kreuznach 80mm f/2.8 LS are leaf-shutter lenses for the 645DF and are not on this page.
How to tell them apart (expand)
  • Plain AF 80mm f/2.8 or Sekor AF 80mm f/2.8 D on the name ring; neither has an aperture ring, and the M645 manual-focus lenses with their aperture ring and A/M lever are a different mount
  • Both take 0.7 m closest focus and the same 6/5 optics; the D has a 67 mm filter thread where the original has 58 mm
  • Focus collar: the original slides fore and aft to switch between AUTO FOCUS and manual; the D has a dedicated auto/manual ring (Adorama)

Mamiya AF 80mm f/2.8 (1999 original):

  • Name ring reads AF 80mm f/2.8 with no D; no aperture ring at all, the aperture being set from the body dial (Mamiya instruction sheet)
  • Mamiya's instruction sheet: 6 elements in 5 groups, 47° angle of view, f/22 minimum, 0.7 m closest focus, 0.15× maximum magnification, 58 mm filter, 49.5 mm long, 77 mm diameter, 300 g
  • Focus collar slides forward to show the AUTO FOCUS engraving and back to cover it for manual focus; the early sheet lists a screw-in hood, the later one a bayonet hood

Mamiya Sekor AF 80mm f/2.8 D:

  • D after the aperture on the name ring; Adorama's listing describes an aluminium barrel cover with black alumite finish, a rubberised focusing ring, an auto/manual focus ring for one-touch switching, and a 16-bit CPU that allows firmware upgrades and lens correction
  • Same 6 elements in 5 groups and 0.7 m closest focus as the original, but the Wikipedia lens table gives a 67 mm filter and 330 g against the original's 58 mm and 300 g; KEH lists the D with a 67 mm thread

Specifications

Formula
6 elements in 5 groups (Mamiya 645AF Interchangeable Lenses instruction sheet)
Construction
6 elements / 5 groups
Aperture range
f/2.8–f/22
Min. focus
0.7 m
Dimensions
77 × 49.5 mm
Weight
300 g
Filter
58 mm
Years manufactured
1999
Country
Japan
Coating
Multicoated: Mamiya America's 2000 lens brochure describes every element as coated with Mamiya's proprietary multicoating; the D lens carries coatings redesigned for digital sensors (dpreview, 2015)

What reviewers say

History

The AF 80mm f/2.8 is the standard lens of the Mamiya 645AF, the company’s first autofocus camera, which reached the Japanese market in September 1999 with a new bayonet that carries electrical contacts and a focus-drive coupling. The lens has no aperture ring: the aperture is set from the body in half stops, and the autofocus motor lives in the body too, so the lens is a small thing of six elements in five groups, 47° angle of view, f/22 minimum, 0.7 m closest focus and 300 g by Mamiya’s own instruction sheet, with a 58 mm filter thread, 49.5 mm length and 77 mm diameter. It shares its focal length and formula type with the manual-focus Sekor C 80mm f/2.8 of 1975, but the two mounts are different and the manual-focus lens fits the AF bodies only for stop-down metering.

Two versions exist. The original is engraved AF 80mm f/2.8 and switches to manual focus by sliding the focus collar back to cover the AUTO FOCUS engraving; Mamiya’s earliest 645AF lens sheet lists it with a screw-in hood among the five lenses of the launch line, and the later sheet gives it a bayonet hood. The Sekor AF 80mm f/2.8 D came in the digital-back era: camera-wiki lists both versions on sale in autumn 2008, and Adorama describes the D with an aluminium barrel, a rubberised focus ring, a dedicated auto/manual focus ring and a 16-bit CPU that allows firmware updates. Wikipedia glosses the D as optimised for digital sensors, and Damien Demolder, reviewing the Phase One 645DF+ in 2015, says the coatings and exit light path were reworked for digital while the barrels stayed film-era. The optics remain 6 elements in 5 groups with 0.7 m closest focus, but the D takes 67 mm filters and weighs 330 g according to the Wikipedia table and KEH’s listing. No source consulted dates the D’s arrival or gives a list price for either.

Reviewers agree that the lens is sharp. Popular Photography’s April 2000 test measured excellent centre resolution at every stop, 70 lines/mm wide open and 78 at f/4, with corners excellent from f/2.8, and concluded that all the Mamiya AF lenses performed outstandingly for moderate prices. Twenty years on, Michael Nguyen at Japan Camera Hunter calls its sharpness clinical and its look luxurious even if the Contax Planar is prettier wide open; Spencer Lookabaugh finds it tack sharp from f/2.8; Teo Totev rates it 7 for sharpness and 7 for bokeh, behind the Schneider-Kreuznach 80mm LS but ahead of the 45mm and 55mm. The disagreements are about the body rather than the glass: single-shot autofocus is quick in good light, continuous autofocus is poor, and the single centre focus point means constant focus-and-recompose.

When buying, check the electronic contacts on the rear mount for corrosion and scratches, since Mamiya’s sheet warns that these cause contact failure, and confirm that the focus collar clicks cleanly between the autofocus and manual positions. On the D, check that the body reports the lens and that the auto/manual ring engages. The Mamiya 80mm f/2.8 LS D and the Schneider-Kreuznach 80mm f/2.8 LS are leaf-shutter lenses for the 645DF and later bodies and are different lenses; the manual-focus Sekor C 80mm f/2.8 and f/1.9 belong to the M645 mount. Sellers use AF, 645AF, 645AFD and Phase One interchangeably, so the name ring decides.

What remains open: the aperture blade count, list prices in yen or dollars, the year the D replaced the original, and Mamiya’s own data sheet for the D.

Expand Collapse

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 taken with the Mamiya 645 AF 80mm f/2.8
Istedgade, Copenhagen: Mamiya 645AFD II, Mamiya AF 80mm f/2.8 at f/5, Kodak DCS Pro Back 645 (Kristoffer Trolle) — Kristoffer Trolle, via Wikimedia Commons (CC BY 2.0)
Sample photo taken with the Mamiya 645 AF 80mm f/2.8
Høje Taastrup Station in winter sun: Mamiya 645AFD II, AF 80mm f/2.8 at f/8, Kodak DCS Pro Back 645 (Kristoffer Trolle) — Kristoffer Trolle, via Wikimedia Commons (CC BY 2.0)
Sample photo taken with the Mamiya 645 AF 80mm f/2.8
Copenhagen Central Station: Mamiya 645AFD II, AF 80mm f/2.8 at f/4, Kodak DCS Pro Back 645 (Kristoffer Trolle) — Kristoffer Trolle, via Wikimedia Commons (CC BY 2.0)

Sample photo wanted — shot with a Mamiya 645 AF 80mm f/2.8? We'd love to feature it (with credit).

Live listings

Asking price, USD: a median of $330 across 19 fixed-price listings on 2026-09-21 (middle half $250–$450). First day tracked.

Asking prices from the listings scanned, not sales; junk-flagged rows and auction lots excluded; other currencies are not converted.

Show 18 more listings

Buying from Yahoo! Auctions outside Japan. It is a domestic marketplace: sellers ship within Japan, and most will not register an overseas buyer. A proxy service bids on your behalf, receives the item and forwards it, for a fee and a wait. Buyee, Jauce and ZenMarket each accept a Yahoo auction number directly. Listed alphabetically for information — none is recommended over another, and none of these is an affiliate link.

Listings updated 2026-09-21. Links go to the shop or marketplace that carries the item.

Related: Mamiya 645 AF 35mm f/3.5 · Mamiya 645 AF 45mm f/2.8 · Mamiya 645 AF 120mm f/4 Macro · Mamiya 645 AF 150mm f/3.5 · Mamiya 645 AF 210mm f/4

Sources (14)

Every page here is assembled from public sources, and the gaps are real ones. If you own this lens, know a serial number I'm missing, or can see where I have it wrong, tell me — corrections, serials and sample photos are all worth having.