W-Nikkor(·C) 3.5cm f/1.8

Nippon Kogaku · Nikon S + LTM · 35mm · f/1.8 · 1956 · Xenotar-derived

Also known as: W-Nikkor 3.5cm f/1.8 · W-Nikkor·C 3.5cm f/1.8 · W-Nikkor.C 3.5cm f1.8 · W-Nikkor C 3.5cm f/1.8 · W-NIKKOR•C 3.5cm f/1.8 · W-Nikkor 35mm f/1.8 · Nikkor-W 3.5cm f/1.8 LTM · Nikon 35mm f/1.8 rangefinder · Nippon Kogaku 3.5cm f/1.8 · 3.5cm f1.8

Variants & identification

Variant	Mount	Years	Serial ranges	Production
Nikon S (1956)	Nikon S	1956	351801–354934 (·C-marked: black filter-ring batch 351802–351868 from Sep 1956, chrome filter ring from 351873) 355003–356087 (plain W-Nikkor, no ·C) 356325–360091 (late blocks with U.S.PAT / J.PAT markings; Vink span total ~8,291)	~6,500 (CameraQuest) of 8,372 total per RFF serial survey
Leica screw mount	LTM	—	181238–182209 (·C-marked — Vink; RFF survey observed 181283–182158) 182337–182842 (no ·C — Vink; RFF survey observed 182456–182797)	1,471 of 8,372 total per RFF serial survey (CameraQuest: ~1,500; Vink span ~1,605)
SP Limited Edition (2005)	Nikon S	2005	0001–2500 (matching body serials; Vink confirms 0001–2453; No.0001 held by the JCII museum)	2,500 sets

How to tell them apart

Nikon S (1956):

Engraved 3.5cm, not 35mm
Family marked both W-Nikkor·C and plain W-Nikkor across the run (the census records the family as W-Nikkor(·C))

SP Limited Edition (2005):

Modern multicoating — so not strictly identical optics, though the 7e/5g formula is unchanged
Sold only as a set with the Nikon SP reissue body, ¥724,500
Coarser 43 × 0.75mm filter thread on the 2005 version vs the original's fine 43 × 0.5mm (Rockwell)

Leica screw mount: The only LTM Nikkor given its own serial sequence — every other screw-mount Nikkor shares serials with the bayonet run (NHS/Rotoloni).
SP Limited Edition (2005): Built by Tochigi Nikon. Same 7e/5g formula per Nikon's own SP Limited spec sheet, with modern multicoating. Richard Haw additionally reports the 2005 lens omits the radioactive lanthanum rear glass, and relays a secondhand report that a bad batch of optical cement gives some examples a tendency toward balsam separation — his report only, not census-verified.

Serial-range notes

351802–351868: First S-mount batch carries a black filter ring (from Sep 1956); chrome filter rings from 351873 on (Vink).
earliest S-mount batch (~first 75–100): Black-painted aperture rings — real and period-documented (1956 advertisement + 1958 brochure); the count is disputed: ~100 per CameraQuest vs roughly the first 75 per 35mmc. Ruled a serial-range note, not a variant (Will, 2026-08-24).

Specifications

Formula: Xenotar-derived
Construction: 7 elements / 5 groups
Aperture range: f/1.8
Diaphragm blades: 9
Min. focus: 0.91 m
Weight: 160 g
Filter: 43 mm (0.5 mm pitch)
Years manufactured: 1956
Country: Japan

What reviewers say

Agata Urbaniak (35mmc) (blog) — A "GAS killer" that became her favorite and most-used lens — very sharp stopped down with perfectly straight lines even at the edges, well-controlled vignetting, and pleasing bubbly bokeh; flare is the notable weakness, showing even stopped down.
Richard Haw (blog) — Highly recommended — there is simply no alternative fast 35 for S-mount: quite sharp in the centre even wide open, with distortion he rates as not bad at all — "quite nice for a vintage Nikkor" — though coma marks the far corners until f/4 and the old coatings make ghosts and flare "quite terrible."
Ken Rockwell (blog) — An excellent lens — superb sharpness on Velvia, no distortion even under the microscope, no lateral color fringes, and the best 35 there is for a Nikon rangefinder — though the contemporary 1958 Summicron is sharper in the corners with much less coma.
Camera no Naniwa staff (カメラのナニワ, Umeda) (blog) — Resolving power that makes you question whether this is really a half-century-old lens — veiled and soft wide open, crisp across the whole frame stopped down, with minimal distortion; their most impressive lens discovery of the year, shot on a black-paint Nikon SP. via machine translation — corrections welcome

Optical ratings

Aggregated from the reviews above — follow the links for the full picture.

Chromatic aberration: low
Vignetting: moderate
Flare & ghosting: prone
Coma: moderate
Distortion: near-zero

History

When the W-Nikkor 3.5cm f/1.8 appeared in September 1956 (Japanese Wikipedia alone says July), it was the world’s brightest wide-angle lens — and the lead held: Leitz took years to answer it. The design was a genuinely new type by Hideo Azuma (東秀夫), a Xenotar-derived front group paired with a rear cemented doublet acting as a field flattener, seven elements in five groups, and the first use of lanthanum glass — a recipe distinctive enough that Nikon patented it in the United States, the patent granted in 1959. Reviewers keep confirming what the spec sheet promised: distortion near zero for a 1950s wide-angle, resolution that embarrasses lenses decades younger, and only the era’s coatings — flare-prone in any backlight — betraying its age.

Production was modest by fast-fifty standards: 8,372 total per the RFF serial survey, which CameraQuest splits at roughly 6,500 in Nikon S mount and 1,500 in Leica screw mount (the survey itself counts 1,471 LTM examples, observed in a ·C-marked serial block at 181283–182158 and a plain-W-Nikkor block at 182456–182797). The earliest S-mount examples carry black-painted aperture rings — real and period-documented in a 1956 advertisement and a 1958 brochure, though the count is disputed: about 100 per CameraQuest, roughly the first 75 per 35mmc. Practical details stayed compact: 43mm filters, a 3-foot minimum focus, and a nine-bladed diaphragm that modern users prize for its sunstars.

The design earned a second life. In 2005 Nikon revived the lens for the SP Limited Edition — 2,500 sets at ¥724,500, each lens serial-matched to its reissued SP body (set No.0001 sits in the JCII museum), built by Tochigi Nikon. Nikon’s own spec sheet confirms the same 7e/5g formula, now with modern multicoating — so not strictly identical optics, but as direct an endorsement as a fifty-year-old wide-angle can get.

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Example photos

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Sample photo wanted — shot with a W-Nikkor(·C) 3.5cm f/1.8? We'd love to feature it (with credit).

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