Mamiya 645 AF APO 300mm f/4.5 IF
Mamiya · Mamiya 645 AF · 1999
Also known as: Mamiya AF APO 300mm f/4.5 IF · Mamiya 645AF 300mm f4.5 APO · Mamiya 645 AF 300mm f/4.5 · Mamiya AF 300mm F4.5 APO IF · Mamiya APO 300mm f/4.5 AF · Mamiya 645AFD 300mm · Phase One 300mm f/4.5 AF APO · Phase One AF 300mm f4.5 · マミヤ AF APO 300mm F4.5 IF · マミヤ645AF 300mm F4.5 · マミヤ AF 300mm F4.5 APO
Variants & identification
| Variant | Mount | Years | Serial ranges | Production |
|---|---|---|---|---|
| Mamiya AF APO 300mm f/4.5 IF | Mamiya 645 AF | 1999 | — | — |
- Optical construction, angle of view, minimum aperture, closest focus, magnification, filter size, hood, dimensions and weight 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, which adds that the 1,430 g includes the detachable tripod collar. Kamerastore's listing, as reported in search results, gives 1,433 g.
- The ¥300,000 price is Mamiya's suggested retail price excluding tax on its 645AFD II lens page, archived April 2008; no launch-year or dollar list price was found.
- The English Wikipedia table lists the lens as '300mm f/4.5 AF D APO IF' with the same 8/8, 3.0 m, 77 mm and 1,430 g as Mamiya's sheets. No other source consulted knows a 300mm D: Mamiya's 2008 page, camera-wiki's autumn 2008 list and the November 2009 Sekor D price list carry only the plain AF APO 300mm f/4.5 IF, and Mamiya Leaf's 2014 page lists no 300mm. The D row is recorded here as unconfirmed rather than as a variant.
- The Japanese Wikipedia product list prints a second 'AF210mmF4IF ULD' row with 8群8枚, 3 m and φ77mm, which are this lens's figures; its own 300mm row (マミヤAFAPO 300mmF4.5 IF, 8群8枚, 3m, φ77) is the one used.
- No source consulted gives the aperture blade count or a discontinuation date.
How to tell them apart
- AF APO 300mm f/4.5 IF on the ring, built-in hood, detachable tripod collar, 77 mm thread, no aperture ring; the manual-focus Mamiya APO A 300mm f/2.8 and Sekor C 300mm f/5.6 of the M645 mount have aperture rings and different speeds
- 213 mm long, 99 mm across and 1,430 g with the collar, 8 elements in 8 groups, 3 m closest focus (Mamiya sheets)
- One version only in Mamiya's own documents; a D on the ring would be a lens no Mamiya page describes
Mamiya AF APO 300mm f/4.5 IF:
- Name ring reads AF APO 300mm f/4.5 IF; built-in sliding hood; no aperture ring; a detachable tripod collar (Mamiya's 2008 lens page: レンズ架台は取り外し式)
- Mamiya's instruction sheets: 8 elements in 8 groups, 14° angle of view, f/32 minimum, 3 m closest focus, 0.11× magnification, 77 mm filter, 213 mm long, 99 mm diameter, 1,430 g with the collar
- Focus collar slides fore and aft to switch between autofocus and manual, like the other AF telephotos; Mamiya's lens sheet says the AUTO FOCUS engraving shows in the forward position, while the 645AFD manual says sliding the ring forward until it clicks covers the engraving and selects manual
- Mamiya AF APO 300mm f/4.5 IF: One of the five lenses on Mamiya's earliest 645AF lens instruction sheet, so part of the September 1999 launch line, and the longest lens Mamiya made for the AF bayonet. Mamiya's 2008 lens page sells it at ¥300,000 before tax and describes chromatic and spherical aberration corrected to the limit, clear high contrast from centre to edge, the clean colour and tonal reproduction of an APO design, and internal focusing for handling. Camera-wiki's autumn 2008 list carries it as AF APO 300mm f/4.5 IF without a D, and Mamiya Leaf's 2014 page lists no 300mm at all. Phase One sold it under its own name.
Specifications
- Formula
- 8 elements in 8 groups, apochromatic, with internal focusing (Mamiya 645AF Interchangeable Lenses instruction sheets)
- Construction
- 8 elements / 8 groups
- Aperture range
- f/4.5–f/32
- Min. focus
- 3 m
- Dimensions
- 99 × 213 mm
- Weight
- 1430 g
- Filter
- 77 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
- ¥300,000 excluding tax (Mamiya's 645AFD II lens page, 2008) (today ¥336,000)
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 APO 300mm f/4.5 IF is the longest lens of the Mamiya 645 AF system, a 182mm equivalent on 6×4.5 film, and one of the five lenses on Mamiya’s earliest 645AF lens instruction sheet, which places it in the September 1999 launch line with the 45, 55, 80 and ULD 210. Mamiya’s sheets give 8 elements in 8 groups, a 14° angle of view, f/32 minimum, 3 m closest focus for 0.11×, a 77 mm filter thread, a built-in hood and a barrel 213 mm long and 99 mm across weighing 1,430 g with its detachable tripod collar. Internal focusing keeps the length and balance constant while the body’s motor drives the focus, and the focus collar slides forward for autofocus and back for manual, as on Mamiya’s other AF telephotos. Mamiya’s own description promises chromatic and spherical aberration corrected to the limit and the clean colour and tonal reproduction of an apochromat.
It has one version by every Mamiya document consulted. The sheets, Mamiya’s 2008 lens page, where it is priced at ¥300,000 before tax, and camera-wiki’s autumn 2008 list all know only the plain AF APO 300mm f/4.5 IF; the November 2009 notice that moved the Sekor D lenses to open pricing lists no 300mm, and Mamiya Leaf’s 2014 page lists no 300mm at all, its longest lenses being the 240mm LS and the 105-210mm zoom. The English Wikipedia table’s ‘300mm f/4.5 AF D APO IF’ row carries Mamiya’s own figures for this lens and is the only mention of a D version found, so it is noted here rather than treated as a second lens. Phase One sold the lens under its own name while it lasted. The manual-focus Mamiya APO A 300mm f/2.8 and Sekor C 300mm f/5.6 of the M645 mount fit the AF bodies only with stop-down metering and are different pages.
No test or review of this lens was found: Popular Photography’s 2000 and 2002 tests stopped at the 210 and the zooms, and Tony Howell’s 300mm page concerns the manual-focus f/5.6. What the maker’s figures say is that it is the heaviest lens in the line by a wide margin and that its 3 m closest focus is long for a 300.
When buying, check the rear electronic contacts, that the focus collar clicks between its positions, that the body drives the long focus throw without stalling, that the built-in hood slides freely and that the tripod collar is present and locks in both orientations. Sellers write AF, 645AF, AFD and Phase One interchangeably; the APO and IF on the ring and the absence of an aperture ring decide.
What remains open: the aperture blade count, a launch-year price in yen or dollars, a discontinuation date, and whether the Wikipedia 300mm 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 APO 300mm f/4.5 IF? We'd love to feature it (with credit).
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