Production
1938 – 1953
Country
Germany
Optical
3 elements in 3 groups (Cooke triplet / Zeiss 'Triotar')
Updated
Jul 13, 2026
Carl Zeiss Triotar
M42 · 135mm · f/4
Compiled from 3 real reviews · AI-assisted · accuracy-checked · Updated 13 Jul 2026
Overview
The Carl Zeiss Jena Triotar 135mm f/4 is a post-war telephoto from one of the most storied names in optics, built on the classic Cooke triplet formula that Zeiss branded 'Triotar' — a simple, economical three-element/three-group design that Zeiss deployed across several focal lengths. Sources place this M42 screw-mount version's production in the 1938–1953 window, straddling the era when Zeiss introduced anti-reflective coatings; coated examples carry the famous red letter 'T' engraved on the front, denoting the T-coating rather than any nickname. Beyond that 'T' marking, the reviews are explicit that the lens carries no established nickname. Its cult following rests on a combination that's unusual for a budget triplet: reviewers repeatedly call it exceptionally sharp ('sharp, sharp, sharp'), praise its colour rendering, and single out an unusually generous 15-blade preset diaphragm that keeps the aperture near-circular for smooth out-of-focus rendering. Add a tank-like, all-metal build described as 'indestructible,' and you have an affordable classic that punches above its simple optical formula — which is exactly why triplet enthusiasts and vintage shooters seek it out.
Verdict: The Carl Zeiss Jena Triotar 135mm f/4 is for the shooter who wants classic Zeiss sharpness and genuinely lovely bokeh from a simple triplet, and who doesn't mind working for it. Its 15-blade preset aperture yields smooth, rounded out-of-focus rendering, its colour is well-liked, and it's sharp enough to earn five-star praise — all in a tank-like metal body. The trade-off is handling: it's big, heavy, slippery and slow to focus, so it rewards patient, deliberate shooting over run-and-gun use. If you value rendering and build over convenience, it's a satisfying, characterful telephoto; if you want a light, quick lens, look elsewhere.
Optical Character
Bokeh
Beautiful, smooth bokeh with highlights kept near-circular by the unusually high 15-blade preset aperture.
Color
Well-regarded colour rendering repeatedly cited by owners as a strength, though not specifically warm or cool.
Sharpness wide open
Rated exceptionally sharp ('sharp, sharp, sharp'), earning five-star optics and user sharpness scores around 4.67/5.
Community Insights
What people love
- Genuine sharpness — reviewers call it 'sharp, sharp, sharp' and rate the optics five stars (user sharpness ~4.67/5), impressive for a simple three-element triplet.
- Beautiful bokeh from the unusually high 15-blade preset aperture, which keeps highlights round and the out-of-focus rendering smooth (bokeh ratings ~4.44/5).
- Well-regarded colour rendering, repeatedly cited by owners as a strength.
- 'Heavy metal indestructible' all-metal build with very high mechanical/build ratings (~4.68/5) — a lens that feels built to last.
What people dislike
- Large and heavy — the size and weight make it awkward to carry and handle.
- Focusing is made difficult by that size and weight.
- A slippery, shiny finish that owners note is hard to grip and 'draws attention' — poor for discreet or comfortable shooting.
Pro Tips
- Lean on the strengths: this lens is already sharp wide open at f/4, so you don't need to stop down heavily for critical detail — use wider apertures to exploit the smooth 15-blade bokeh for subject separation.
- It's a preset lens — set your working aperture on the preset ring first, focus wide open for a bright, precise view, then turn the aperture ring down to the preset stop just before shooting.
- Because the lens is heavy and hard to hold steady, stabilize it — a support or a firm two-handed grip — and take extra care nailing focus at 135mm, where depth of field is thin and any camera shake is magnified.
- Mind the slippery, shiny barrel when focusing; a firm, deliberate grip helps you avoid slipping off focus, which is the most-cited handling complaint.
- Stop down a stop or two when you want maximum across-the-frame crispness for landscapes or detail work, while keeping in mind the 15 blades preserve rounded highlights even when closed down.
Compatible Adapters
Real adapters from our shop that fit this lens mount.
Standard · ฿325 · In stock
Standard · ฿325 · In stock
Standard · ฿325 · In stock
Standard · ฿325 · In stock
Standard · ฿540 · In stock
Standard · ฿540 · In stock
Standard · ฿540 · In stock
Standard · ฿540 · In stock
Standard · ฿540 · In stock
Standard · ฿1,250 · In stock
Standard · ฿890 · Out of stock
Standard · ฿890 · Out of stock
Sources (3)
Carl Zeiss Jena Triotar 135mm f4 M42
Carl Zeiss Jena Triotar 135mm f/4.0 — Specs, MTF, User Reviews
Web research
The Carl Zeiss Jena Triotar 135mm f/4 is for the shooter who wants classic Zeiss sharpness and genuinely lovely bokeh from a simple triplet, and who doesn't mind working for it. Its 15-blade preset aperture yields smooth, rounded out-of-focus rendering, its colour is well-liked, and it's sharp enough to earn five-star praise — all in a tank-like metal body. The trade-off is handling: it's big, heavy, slippery and slow to focus, so it rewards patient, deliberate shooting over run-and-gun use. If you value rendering and build over convenience, it's a satisfying, characterful telephoto; if you want a light, quick lens, look elsewhere.
https://m42lens.blogspot.com/2013/04/carl-zeiss-jena-triotar-135mm-f4.htmlhttps://allphotolenses.com/lenses/item/c 717.html