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

Mamiya-Sekor Z 360mm f/6 W (RZ67)

Mamiya · Mamiya RZ67 · 1982

single source, unconfirmed

Also known as: Mamiya-Sekor Z 360mm f/6 W · Mamiya Sekor Z 360mm F6 W · Mamiya Sekor Z 360mm f/6 · Mamiya Sekor Z 360mm f/6.0 · Mamiya RZ67 360mm f/6 · Mamiya RZ 360mm 6 W · Z360mm f/6.0W · マミヤ セコール Z 360mm F6 W · マミヤセコールZ 360mm F6 · マミヤ RZ67 360mm F6

Variants & identification

Variant Mount Years Serial ranges Production
Mamiya-Sekor Z 360mm f/6 (1982, full-stop aperture ring) Mamiya RZ67 1982 — —
Mamiya-Sekor Z 360mm f/6 W (half-stop aperture ring) Mamiya RZ67 — — —
  1. The W designation is explained by Japanese Wikipedia (絞り目盛の間隔が広くなり、1/2段絞りが追加された: wider aperture-scale spacing, half stops added) and by Emulsive (half-stop markings, optics unchanged). No Mamiya document consulted dates the W.
  2. Construction, angle of view, minimum aperture and closest focus for the 1982 lens are from the RZ67 Professional instruction manual's lens table, which prints construction as groups-elements (5-6) and marks the 360 with an asterisk: not presently available. The manual gives no weights.
  3. Weight, dimensions and magnification are from Mamiya's Mamiya-Sekor Z Interchangeable Lenses sheet, whose minimum-focus column is measured from the lens front rim with the bellows fully extended (46 mm), not from the film plane; the 3.69 m in the spec fields is the 1982 manual's figure, which Japanese Wikipedia repeats. The sheet's dimension column is read here as diameter × length. camera-wiki's 6 elements in 6 groups disagrees with both Mamiya documents and is not used.
  4. Mamiya's Lens Holder manual covers the Sekor Z 360mm f/6 W, APO-Sekor Z 350mm f/5.6, Sekor C 360mm f/6.3 and APO KL 350mm f/5.6: a rail under the body with a cradle for the front barrel and its own tripod socket. Lucain reports that the 360, being shorter than the 350, sits awkwardly in the holder; Mamiya's manual provides two mounting positions but distinguishes them by body (RZ, RB), not by lens.
  5. No aperture-blade count, coating description or list price in any currency was found in a Mamiya document; Kamerastore's 8 blades is a dealer figure and is left out. The single-source flag covers the non-W barrel's existence as a separate marking, which rests on the 1982 manual's photographs and dealer listings rather than on a Mamiya statement.
How to tell them apart (expand)
  • Every version: RZ bayonet with electrical contacts and a Seiko #1 electronic leaf shutter; no shutter-speed ring on the lens. A 360mm with its own speed ring and an f/6.3 maximum is the RB67's Sekor C 360mm f/6.3, a different lens
  • Two name rings: plain Z (full-stop ring, announced 1982) and W (half stops, same 6-in-5 optics)
  • Minimum aperture f/45; 77 mm filter thread and screw-in hood; 166 mm long against the APO 350's 192 mm
  • Not to be confused with the APO-Sekor Z 350mm f/5.6, the apochromat that replaced it in the range

Mamiya-Sekor Z 360mm f/6 (1982, full-stop aperture ring):

  • Engraved MAMIYA-SEKOR Z f=360mm 1:6 with no W after the aperture; aperture ring clicks at full stops only¹
  • 1982 RZ67 instruction manual: 5 groups, 6 elements, 14° angle of view, f/45 minimum, 3.69 m closest focus, 77 mm screw-in filter and hood; marked with an asterisk as not yet available²
  • Pictured with its cross-section on page 41 of the 1982 manual beside the 500mm f/8

Mamiya-Sekor Z 360mm f/6 W (half-stop aperture ring):

  • W after the aperture on the name ring; half-stop aperture clicks and wider scale spacing¹
  • Mamiya-Sekor Z lens sheet: 6 elements in 5 groups, 14°, f/45, 0.13× at full bellows extension (3380 mm from the front rim), 175 mm equivalent, 77 mm filter, 97 × 166 mm, 1110 g³
  • Japanese Wikipedia: セコールZ 360mmF6, 5群6枚, closest focus 3.69 m, φ77 mm screw-in
  • Named on the cover of Mamiya's Lens Holder manual as Sekor Z 360mm F6W⁴

Specifications

Formula
Telephoto, 6 elements in 5 groups (1982 RZ67 manual; Mamiya lens sheet)
Construction
6 elements / 5 groups
Aperture range
f/6–f/45
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
3.69 m
Dimensions
97 × 166 mm
Weight
1110 g
Filter
77 mm
Years manufactured
1982
Country
Japan

What reviewers say

Optical formula — Telephoto, 6 elements in 5 groups (1982 RZ67 manual; Mamiya lens sheet)

History

The 360mm f/6 is the RZ67’s original long telephoto, 175 mm in 35 mm terms by Mamiya’s conversion, and the longest lens in the system that a 77 mm filter fits. The 1982 RZ67 Professional manual lists it at 5 groups and 6 elements, 14°, f/6 to f/45, a closest focus of 3.69 m and a 77 mm screw-in filter and hood, pictures it with its cross-section beside the 500mm f/8, and marks both with the asterisk that means not yet available. Mamiya’s later Mamiya-Sekor Z lens sheet gives the same construction for the Z360mm f/6.0W, with 1110 g, a 97 × 166 mm barrel and 0.13× at full bellows extension. Japanese Wikipedia carries 5群6枚 and 3.69 m; camera-wiki’s 6 elements in 6 groups matches neither Mamiya document.

The two name rings are plain Z and W. The Z has a full-stop aperture ring; the W, per Japanese Wikipedia and Emulsive, added half-stop clicks and a wider scale with the optics unchanged, which the identical figures in the two Mamiya documents support. No source dates the W. The lens was dropped from the range when the APO-Sekor Z 350mm f/5.6 arrived: the 2004 Pro IID brochure lists the 350 APO and no 360, and English Wikipedia calls the 360 an older lens. Mamiya’s Lens Holder manual names the two together on its cover with their RB67 counterparts, the Sekor C 360mm f/6.3 and APO KL 350mm f/5.6, which have their own shutter-speed rings and are different lenses.

Reviewers split. Pierre-Gilles Lucain, who has used it, calls the 360 a great lens and its results really incredible for glass without APO correction, and carries it on mountain treks in preference to the 500 for weight; he also notes that it takes the 1.4× teleconverter, which the 350 APO does not. A member of the Flickr RZ67 group expected the 180’s quality and was underwhelmed, suspecting shake and the lack of a support, and recommended the newer 350 APO instead. Both are describing the same lens at 360 mm on a body with a large mirror; the disagreement is as much about technique and support as about the glass.

Buying checks are the RZ system’s, plus the support question. 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 lens comes off only when the body’s lever has cocked it 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, and check the rear contacts. Mamiya’s Lens Holder for the 350 and 360 puts a tripod socket at the balance point and cradles the narrower front barrel; Lucain finds it a poor fit on the shorter 360, and Mamiya’s manual says not to carry body, lens and holder by the tripod. The RB67’s 360mm f/6.3, which mounts on an RZ with the dial at RBL, sells under almost the same name and has a narrow barrel that the holder cannot support at close focus.

What could not be sourced: the year of the W, a weight for the 1982 barrel from a Mamiya document, the number of aperture blades, the coating, a list price in any currency, and the year production ended. 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-Sekor Z 360mm f/6 W (RZ67)? We'd love to feature it (with credit).

Live listings

Asking price, USD: a median of $170 across 12 fixed-price listings on 2026-09-21 (middle half $140–$230). First day tracked.

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

Show 12 more listings

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

Related: Mamiya-Sekor Z 180mm f/4.5 W-N (RZ67) · Mamiya-Sekor Z 250mm f/4.5 W / APO (RZ67) · Mamiya APO-Sekor Z 350mm f/5.6 (RZ67) · Mamiya APO-Sekor Z 500mm f/6 (RZ67) · Mamiya-Sekor Z 500mm f/8 W (RZ67)

Sources (12)

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.