Mamiya Sekor AF 150mm f/2.8 IF D
Mamiya · Mamiya 645 AF · 2008
Also known as: Mamiya Sekor AF 150mm f/2.8 IF D · Mamiya 150mm f2.8 D IF · Mamiya AF 150mm F2.8 D · Mamiya 645 AF 150mm f/2.8 · Mamiya 645AFD 150mm f2.8 · Mamiya Sekor D 150mm f/2.8 · Phase One 150mm f/2.8 AF · Phase One AF 150mm f2.8 IF · マミヤ セコール AF 150mm F2.8 IF D · マミヤ AF 150mm F2.8 D · マミヤ645AF 150mm F2.8
Variants & identification
| Variant | Mount | Years | Serial ranges | Production |
|---|---|---|---|---|
| Mamiya Sekor AF 150mm f/2.8 IF D | Mamiya 645 AF | 2008 | — | — |
- Closest focus (1 m), maximum magnification (0.19×), filter thread (72 mm), dimensions (85 mm maximum diameter × 120 mm length) and weight (780 g) are from dc.watch's PIE2008 report of 20 March 2008; Mamiya Leaf's page repeats 120 × 85 mm, 780 g, 26° angle of view and f/2.8–22, and the English Wikipedia table 8/7, 1.0 m, 72 mm, 780 g, f/2.8–22. The 8 elements in 7 groups come from the two Wikipedia lists; dc.watch does not print the construction.
- Price: ¥257,250 at the April 2008 release and on the November 2009 list, after which the lens went to open pricing; Japanese prices of the period include tax. No dollar list price was found in a source consulted.
- The AF 150mm f/3.5 (5 elements in 5 groups, 1.5 m, 58 mm, 540 g) and its D version are a separate, slower family; the Schneider-Kreuznach 150mm f/3.5 LS and Mamiya Sekor 150mm f/3.5 LS D are leaf-shutter lenses for the 645DF. None is on this page.
- The aperture blade count and a discontinuation date are not given by any source consulted.
How to tell them apart
- Sekor AF 150mm f/2.8 IF D on the ring, 72 mm thread, no aperture ring; the AF 150mm f/3.5 has a 58 mm thread and the manual-focus Sekor C 150mm f/2.8 A of the M645 mount has an aperture ring
- Internal focusing with a sliding distance ring for AF/MF; 120 mm long, 85 mm across, 780 g
- An LS marking or a leaf shutter means one of the 645DF lenses, which are f/3.5
Mamiya Sekor AF 150mm f/2.8 IF D:
- Sekor AF 150mm f/2.8 IF D on the name ring; 72 mm filter thread where the slower AF 150mm f/3.5 takes 58 mm; internal focusing, so the length does not change (dc.watch, March 2008)
- Autofocus and manual focus switched by sliding the distance ring fore and aft (dc.watch, March 2008); Mamiya Leaf calls it a push-pull AF lock
- 120 mm long, 85 mm across, 780 g by dc.watch and Mamiya Leaf; 1.0 m closest focus against 1.5 m for the f/3.5
- Mamiya Sekor AF 150mm f/2.8 IF D: The only version. Shown at PIE2008 in March 2008 alongside the 645AFD III, the Sekor AF 80mm f/2.8 D and the Sekor Zoom AF 45-90mm f/4.5 D, and put on sale on 21 April 2008, the body's launch day, at ¥257,250 (dc.watch, 20 March 2008). The same price appears on Mamiya's November 2009 list of Sekor D lenses moved to open pricing, with a note that the lens was the one exhibited at PIE2008; that notice names the Mamiya ZD, 645AFD III and 645DF as the bodies for the series. Mamiya Leaf's 2014 page still lists it, as a fast lens for weddings and portraits with internal focusing for filter and vignette work, and Phase One sold it under its own name. Camera-wiki's autumn 2008 list carries it next to the plain AF 150mm f/3.5, which stayed on sale.
Specifications
- Formula
- 8 elements in 7 groups with internal focusing (Japanese Wikipedia product list; English Wikipedia lens table)
- Construction
- 8 elements / 7 groups
- Aperture range
- f/2.8–f/22
- Min. focus
- 1 m
- Dimensions
- 85 × 120 mm
- Weight
- 780 g
- Filter
- 72 mm
- Years manufactured
- 2008
- Country
- Japan
- Coating
- Multicoated; Mamiya America's lens brochure says every element is coated with Mamiya's proprietary multi-coating process, and Damien Demolder's 2015 field test says the D-era lenses carry coatings and an exit light path reworked for digital sensors (dpreview, cited on the AF 80mm page)
- Original price
- ¥257,250 (2008, tax included) (today ¥288,000)
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 Sekor AF 150mm f/2.8 IF D is the fast portrait telephoto of the Mamiya 645 AF system, a 93mm equivalent on 6×4.5 film, and a lens of the digital era rather than the 1999 launch: Mamiya Digital Imaging showed it at PIE2008 in March 2008 with the 645AFD III and the Sekor AF 80mm f/2.8 D, and put it on sale on 21 April 2008, the body’s launch day, at ¥257,250. It is a different lens from the AF 150mm f/3.5 that had served since 2000, a stop faster, 8 elements in 7 groups against 5 in 5, focusing to 1 m rather than 1.5 m, with a 72 mm thread instead of 58 mm, internal focusing, and 780 g in a barrel 120 mm long and 85 mm across. Autofocus and manual focus are switched by sliding the distance ring, the arrangement Mamiya used on all its AF telephotos and zooms.
The D in the name is the Sekor D series of 2007 onward, which Wikipedia glosses as lenses optimised for digital sensors and which the Japanese product list describes as new designs for the 21-megapixel Mamiya ZD. The November 2009 notice that moved the series to open pricing names the Mamiya ZD, the 645AFD III and the 645DF as its bodies, and Mamiya’s own 645AFD III specification page quotes the camera’s metering range with a D lens fitted, so this lens belongs with the last film body of the line as much as with the digital ones. It stayed in production through the Phase One and Mamiya Leaf years, when Mamiya Leaf’s page sold it as a wedding and portrait lens whose internal focus suits filters and vignettes, and Phase One sold it under its own name. The slower f/3.5 remained on sale beside it.
No independent test of the lens was found: the reviews of the 645AF system that exist concern the 45, 80, 150mm f/3.5 and the zooms, and the fast 150 postdates most of them. Mamiya Leaf’s claim of edge-to-edge sharpness wide open is the maker’s.
When buying, check the rear electronic contacts, that the distance ring slides cleanly between its two positions, that the body reports the lens and drives it from 1 m to infinity without hesitation, and that the aperture reads out: an original 645AF needs a factory conversion for D lenses and an early AFD a software update. The AF 150mm f/3.5, the manual-focus Sekor C 150mm f/2.8 A of the M645 mount and the leaf-shutter 150mm f/3.5 LS lenses of the 645DF are different lenses, and sellers write AF, AFD, 645DF and Phase One interchangeably, so the aperture and the IF D on the ring decide.
What remains open: the aperture blade count, the angle of view from a Mamiya document, a dollar list price, and a discontinuation date.
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 Sekor AF 150mm f/2.8 IF D? We'd love to feature it (with credit).
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