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

Mamiya-Sekor Z 150mm f/3.5 W (RZ67)

Mamiya · Mamiya RZ67 · 1999 · 6 elements in 4 groups (Mamiya lens sheet and brochures)

Also known as: Mamiya-Sekor Z 150mm f/3.5 W · Mamiya Sekor Z 150mm F3.5 W · Mamiya Sekor Z 150mm f/3.5 · Mamiya RZ67 150mm f/3.5 · Mamiya RZ 150mm 3.5 · Z150mm f/3.5W · マミヤ セコール Z 150mm F3.5 W · マミヤセコールZ 150mm F3.5W · マミヤ RZ67 150mm F3.5

Variants & identification

Variant Mount Years Serial ranges Production
Mamiya-Sekor Z 150mm f/3.5 W (the only version) Mamiya RZ67 — — —
  1. The family year of 1999 is the earliest Mamiya document read here that names the lens, the February 1999 RZ67 Pro II brochure, not a release date. The June 1988 RZ67 Professional brochure does not list it and the undated Mamiya-Sekor Z lens sheet does, so it appeared between mid-1988 and early 1999; no source consulted narrows that. The W designation is explained by Japanese Wikipedia (wider aperture-scale spacing, half stops added) and Emulsive.
  2. Construction, angle of view, magnification, dimensions and weight are from Mamiya's Mamiya-Sekor Z lens sheet, whose minimum-focus column is measured from the lens front rim with the bellows fully extended (46 mm); the 0.82 m closest focus from the film plane is from the 1999 and 2004 brochures. The sheet's dimension column is read as diameter × length, the brochures' as length × width.
  3. No aperture-blade count, coating description or list price in any currency was found in a Mamiya document; those fields are left empty rather than guessed.
How to tell them apart (expand)
  • RZ bayonet with 12 electrical contacts and a Seiko #1 electronic leaf shutter; no shutter-speed ring on the lens. A 150mm with its own speed ring is the RB67's 150mm f/4 soft-focus, a different lens, and Mamiya's other 150s are for the 645, the 6 and the 7
  • One name ring only: MAMIYA-SEKOR Z f=150mm 1:3.5 W, with half-stop clicks; 77 mm filter thread and screw-in hood (M77 No. 2)
  • f/32 minimum aperture, against f/45 on the 180 W-N and the APO telephotos

Mamiya-Sekor Z 150mm f/3.5 W (the only version):

  • Engraved MAMIYA-SEKOR Z f=150mm 1:3.5 W; half-stop aperture clicks. No plain Z, W-N, L-A or APO version of the 150 exists in any Mamiya document consulted¹
  • Mamiya-Sekor Z lens sheet: 6 elements in 4 groups, 33°, f/32, 0.31× at full bellows extension (584 mm from the front rim), 183 × 227 mm covered, 73 mm equivalent, 77 mm filter, screw-in hood, 97 × 83 mm, 825 g²
  • 1999 Pro II and 2004 Pro IID brochures: closest focus 0.82 m from the film plane, 83 × 97.2 mm, 825 g; lens hood M77 No. 2, shared with the 180, 210, 250 and 350²

Serial-range notes

two-letter date code
Mamiya dated RB and RZ lenses with a two-letter code stuck to the back of the lens: the first letter is the year, the second the month, A = January. Year letters run A–J for 1971–1980, A–T for 1981–2000 and A–N for 2001–2014, so the decade has to be read from the generation (Mamiya Repair). No serial-to-year table for the 150 has been published.

Specifications

Formula
6 elements in 4 groups (Mamiya lens sheet and brochures)
Construction
6 elements / 4 groups
Aperture range
f/3.5–f/32
Shutter
Seiko #1 electronic leaf shutter in the lens, 8s–1/400 plus B and T, set from the body dial; a mechanical 1/400 works without a battery
Min. focus
0.82 m
Dimensions
97.2 × 83 mm
Weight
825 g
Filter
77 mm
Years manufactured
1999
Country
Japan

What reviewers say

Optical formula — 6 elements in 4 groups (Mamiya lens sheet and brochures)

History

The 150mm f/3.5 is the fast short telephoto of the RZ67, 73 mm in 35 mm terms by Mamiya’s conversion, and the one RZ lens between the 127 and the 180 that was designed from the start as a W lens. Mamiya’s Mamiya-Sekor Z lens sheet gives 6 elements in 4 groups, a 33° angle of view, f/3.5 to f/32, 0.31× with the bellows fully extended, a 77 mm filter thread, a barrel 97 mm across and 83 mm long, and 825 g; the 1999 Pro II brochure adds a closest focus of 0.82 m from the film plane and describes the 150 and 180 as holding image quality and natural colour across the whole frame even wide open. It is a full stop faster than the 180 W-N and about 75 g lighter, and it takes the same M77 No. 2 screw-in hood as the 180, 210, 250 and 350.

There is one version. The lens is not in the 1982 RZ67 manual, the first Mamiya-Sekor Z Lenses booklet or the June 1988 RZ67 Professional brochure, whose thirteen lenses run from the 127mm f/3.8 W to the Macro 140 and the 180 W-N with nothing at 150; it is in the undated Mamiya-Sekor Z lens sheet, in the February 1999 Pro II brochure and in the 2004 Pro IID brochure. The family year of 1999 above is the earliest Mamiya print that names it, not a release date; it appeared somewhere between mid-1988 and early 1999, and no source read here says when. Japanese Wikipedia’s otherwise complete RZ lens list leaves it out. No plain Z, W-N, L-A or APO 150 was made, so the name ring always reads Mamiya-Sekor Z 150mm 1:3.5 W with half-stop clicks.

Reviewers like it and argue about what it is for. Pierre-Gilles Lucain (Emulsive) calls it a great, sharp lens and his general lens for landscapes, street and portraits. On Luminous Landscape, ixpressraf names it one of his most used studio lenses and TMARK prefers it to the 140mm macro for portraits because the macro is too sharp, while Frank Doorhof on the same thread ranks the 180, 140 and 110 ahead of it. MaxKißler on GetDPI, comparing the two on a digital back, finds the 150 sharp in the centre but losing resolution towards the edges wide open, with no difference from the 140 by f/11, and gives the 150 the speed and the 140 the versatility. The only optical criticism anywhere is that edge softness at f/3.5, and it comes from a forum comparison rather than a formal test.

The buying checks are the RZ system’s. The Seiko #1 electronic leaf shutter fires only with a working 6 V battery in the body and gives a mechanical 1/400 without one; the lens comes off only when cocked with the mirror down, so a lens that will not release is usually a cocking-state matter. Run the shutter at 8 s and 1/400 and watch the blades, work the depth-of-field preview and T levers, check the 12 rear contacts, and do not over-tighten the breech ring. The name to avoid is the RB67’s 150mm f/4 soft-focus, which has its own speed ring and mounts on an RZ at RBL; Mamiya’s 150s for the 645, the 6 and the 7 do not fit at all.

What could not be sourced: the year the lens appeared, the number of aperture blades, the coating, a list price in any currency, and the year production ended. Mamiya’s sheet and both brochures agree on the optics and weight; no designer is named anywhere.

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 wanted — shot with a Mamiya-Sekor Z 150mm f/3.5 W (RZ67)? We'd love to feature it (with credit).

Live listings

Asking price, USD: a median of $190 across 5 fixed-price listings on 2026-09-21 (middle half $110–$280). First day tracked.

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

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-Sekor Z 110mm f/2.8 W (RZ67) · Mamiya-Sekor Z 127mm f/3.5 W (RZ67) · Mamiya-Sekor Macro Z 140mm f/4.5 (RZ67) · Mamiya-Sekor Z 180mm f/4.5 W-N (RZ67) · Mamiya-Sekor Zoom Z 100–200mm f/5.2 W (RZ67) · Mamiya Soft M 180mm f/4 D/L Variable Soft Focus (RZ67)

Sources (13)

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.