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

Mamiya M 75mm f/3.5 L (RZ67)

Mamiya · Mamiya RZ67 · 1994

single source, unconfirmed

Also known as: Mamiya M 75mm f/3.5 L · Mamiya M 75mm f3.5 L RZ67 · Mamiya RZ67 75mm f/3.5 L · Mamiya RZ 75mm 3.5 L · M75mm f/3.5L · Mamiya 75mm f/3.5 floating RZ · マミヤ M 75mm F3.5 L · マミヤ RZ67 75mm F3.5 L · マミヤ RZ 75mm F3.5

Variants & identification

Variant Mount Years Serial ranges Production
Mamiya M 75mm f/3.5 L (floating element; the only version) Mamiya RZ67 — — —
  1. The floating procedure is Mamiya's, from the Pro II era lens sheet: focus with the body knob, read the subject distance, turn the floating ring until the same figure sits against the white hash mark, then check focus again; the sheet warns that peripheral image quality deteriorates significantly if the ring is left unset, and that the ring cannot be used to focus.
  2. Construction, angle, minimum aperture, closest focus and 35 mm equivalent are from the RZ lens table in Mamiya's c. 1994 system brochure (Pacific Rim Camera's scan, which dates it by its mention of the 1994 introduction of the RZ67 Pro II in the United States; Japanese Wikipedia dates the Pro II to February 1993). It is the only Mamiya document found with figures for this lens, so the spec fields rest on it: single source. Emulsive prints the same 9 elements in 7 groups.
  3. The 77 mm filter thread is stated by Emulsive and implied by camera-wiki, which lists the 37 mm, the 75 mm shift and SB lenses and the 500s as the only RZ lenses not on 77 mm; no Mamiya document consulted prints a filter size, weight or dimensions for this lens. Emulsive gives 980 g, the same figure Mamiya gives for the RB67's K/L 75mm f/3.5 L, and it is left out of the spec fields.
  4. The launch year is not known. The lens is absent from Mamiya's Mamiya-Sekor Z lens sheet, whose cover shows the first Professional body, and present in the Pro II era lens sheet and the c. 1994 brochure, the earliest dated Mamiya document naming it; 1994 is entered as a no-later-than year, not a launch date: single source. Its absence from the 2004 Pro IID brochure's lens table, while its lens case is still listed, suggests it had gone by then, but no Mamiya source says so.
  5. 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, since the body dial sets it. A 75mm f/3.5 with its own speed ring is the RB67's K/L 75mm f/3.5 L, a different lens that mounts on an RZ body with the dial at RBL
  • M 75mm f/3.5 L on the ring with a floating ring behind the aperture ring means this lens; Shift Z 75mm f/4.5 W with a shift knob on a stalk, or M 75mm f/4.5 L SB, are the other RZ 75s and different families
  • One version only: no Sekor Z, W or non-floating 75mm f/3.5 was made for the RZ

Mamiya M 75mm f/3.5 L (floating element; the only version):

  • Engraved MAMIYA M f=75mm 1:3.5 L with no Sekor name and no W, the M-series style; a floating ring with its own distance scale behind the aperture ring, to be set to the focused distance after focusing¹
  • Mamiya's c. 1994 system brochure: 9 elements in 7 groups, 61°, f/32 minimum, 38 cm closest focus, 36 mm equivalent²
  • Mamiya's Pro II era Mamiya Interchangeable Lenses sheet: shown as M 75mm f/3.5L, fourth in the line-up between the M 65mm f/4 L-A and the Shift Z 75mm f/4.5 W, and named with the M65 L-A and Macro M140 as the lenses with the built-in floating system
  • 77 mm front thread and a plain round barrel with no shift knob, no shift scale and no cocking ring; the shift lens of the same focal length is f/4.5, takes 105 mm filters and is 152 mm long³

Specifications

Formula
Wide-angle with a floating element and ultra-low-dispersion glass, 9 elements in 7 groups (Mamiya c. 1994 system brochure)
Construction
9 elements / 7 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
0.38 m
Filter
77 mm
Years manufactured
1994
Country
Japan

What reviewers say

History

The M 75mm f/3.5 L is the RZ67’s fast moderate wide-angle, a stop faster than the 75mm shift lens of the same focal length and a different lens entirely: a plain round barrel with a floating-element ring, 77 mm filters and no shift movement. It covers 61° across the 6×7 frame, or about 36 mm in 35 mm terms by Mamiya’s conversion, and sits between the 65mm f/4 and the 90mm f/3.5 in the line. Mamiya’s c. 1994 system brochure gives 9 elements in 7 groups, f/3.5 to f/32 and a closest focus of 38 cm, and is the only Mamiya document found with figures for it; the Pro II era Mamiya Interchangeable Lenses sheet shows the lens fourth in a 19-lens line-up and names it, with the M 65mm f/4 L-A and the Macro M 140mm, as one of the three lenses with the built-in floating system. Japanese Wikipedia’s account of the RB67’s K/L 75mm f/3.5 L, which has the same construction, adds that the glass includes an ultra-low-dispersion element.

One version exists and it belongs to the Pro II era. The lens is not on Mamiya’s Mamiya-Sekor Z lens sheet, whose cover still shows the first Professional body and whose floating-lens paragraph names only the ULD M50, the M65 L-A and the M140; it appears in the Pro II era sheet and the c. 1994 brochure; and it is missing from the 2004 Pro IID brochure’s lens table, although that brochure still lists a lens case for the 75 f/3.5. No Mamiya source dates its launch or its end, so the 1994 entered here is a no-later-than year. It carries the M-series style of engraving, without the Sekor name, and the L suffix Mamiya gave its floating-element lenses. Pierre-Gilles Lucain’s Emulsive guide says the lens was made first for the RB67 as the K/L 75mm f/3.5 L and adapted to the RZ with the electronics and rear contacts added, and Mamiya’s c. 1994 brochure says in general terms that the K/L lenses are optically identical to the RZ series; the RB lens carries its own shutter-speed ring and is a different lens with its own page.

The floating ring is the thing to understand. Mamiya’s procedure, from the Pro II era sheet, is to focus with the body’s knob as usual, read the subject distance, turn the floating ring until the same figure sits against the white hash mark, and then check focus again in the finder; the ring moves part of the lens system to hold contrast and resolution from centre to edge at the set distance, it cannot be used to focus, and the sheet warns that peripheral image quality deteriorates significantly if it is left unset. Lucain’s general point about the L-A and L lenses is that the floating benefit is edge sharpness at close distances, under five to ten metres, and negligible beyond that, so a landscape photographer at infinity loses nothing by forgetting the ring and a still-life photographer at a metre loses a great deal.

Lucain’s is the only review found and it is a wish rather than a report: he does not own the lens, likens the focal length in use to the 35mm f/1.4 he shot on 35 mm film, and names it as the 75 to buy for anyone who does not need the shift lens. Nothing was found from the other review sites on the list, and the lens is scarce enough on the used market that it is rarely written about. Buying advice is the RZ system’s. The Seiko #1 electronic leaf shutter fires only with a working 6 V battery in the body; without one it gives a mechanical 1/400 and nothing else. The shutter is cocked by the body’s lever with the mirror down, and the lens will not come off unless it is cocked. Run the shutter at 8 s and 1/400 and watch the blades, work the depth-of-field preview and T levers, inspect the 12 rear contacts, turn the floating ring through its whole scale and confirm it moves freely and that the image on the screen shifts slightly as it does, and look through the lens against a light for haze and separation.

What could not be sourced: the launch year and the year production ended, a weight, dimensions or filter size from a Mamiya document, the number of aperture blades, a description of the coating, and a list price in yen or dollars. No designer is named anywhere.

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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 M 75mm f/3.5 L (RZ67)? We'd love to feature it (with credit).

Live listings

Asking price, USD: a median of $900 across 5 fixed-price listings on 2026-09-21 (middle half $870–$900). First day tracked.

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

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

Related: Mamiya-Sekor Fisheye Z 37mm f/4.5 W (RZ67) · Mamiya-Sekor Z 50mm f/4.5 W (RZ67) · Mamiya-Sekor Z 65mm f/4 W (RZ67) · Mamiya-Sekor Shift Z 75mm f/4.5 W (RZ67) · Mamiya-Sekor Z 90mm f/3.5 W (RZ67)

Sources (11)

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.