Production
1970 – 1974
Country
Japan
Optical
7 elements in 6 groups
Updated
Jul 18, 2026
Revuenon 55mm f/1.2
M42 · 55mm · f/1.2
Compiled from 4 real reviews · AI-assisted · accuracy-checked · Updated 18 Jul 2026
Overview
The Revuenon 55mm f/1.2 MC is a Tomioka-designed fast normal sold under many brand names: Revuenon, Rikenon, Porst, Chinon, and others. Tomioka was the OEM behind many legendary fast 55mm lenses. At f/1.2, it offers razor-thin depth of field and distinctive rendering.
Verdict: A genuine f/1.2 that delivers. The Revuenon 55mm f/1.2 offers excellent bokeh, sharp performance even wide open, and distinctive vintage rendering. The warm color cast and low contrast at f/1.2 are character, not flaws. A hidden gem among fast fifties.
Optical Character
Bokeh
Excellent bokeh with dreamy wide-open rendering; backgrounds dissolve into many small bubbles/circles of light with distinctive vintage character.
Color
Warm, slightly yellowish-brown color cast adds vintage character, especially at f/4-f/8.
Sharpness wide open
Sharp and usable at f/1.2 with some softness and low contrast; becomes super sharp at f/2 with sweet spot around f/5.6.
Flare resistance
Prone to flare when shooting toward light sources; hood recommended for contrast preservation.
Contrast
Low contrast at f/1.2 giving a dreamy glow; builds to punchy contrast when stopped down.
Vignetting
Strong at f/1.2, clears by f/2.
Community Insights
What people love
- Excellent bokeh
- Sharp even at f/1.2
- Razor-thin DOF
- Close focus (60cm)
- Well built
- 9 aperture blades
What people dislike
- No aperture click between f/1.2 and f/2
- Flare prone
- Low contrast wide open
- Warm color cast
Pro Tips
- All brand names are basically same lens
- f/1.2 is usable, not just marketing
- The glow at f/1.2 is a feature, not a bug
- Hood essential for contrast
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 · ฿1,250 · In stock
Standard · ฿890 · Out of stock
Pentax K Lenses to Canon EOS R Mount Camera Adapter
Standard · Out of stock
Pentax K Lenses to Canon EOS Camera Mount Adapter
Standard · Out of stock
Sample Photos
Sources (4)
allmyfriendsarejpegs.com
jonasraskphotography.com
Curated heritage archive
A genuine f/1.2 that delivers. The Revuenon 55mm f/1.2 offers excellent bokeh, sharp performance even wide open, and distinctive vintage rendering. The warm color cast and low contrast at f/1.2 are character, not flaws. A hidden gem among fast fifties.
Web research
Buy this lens if you shoot for mood: portraits, low light, and backgrounds you want to melt into fields of small glowing bubbles. It's a genuine f/1.2 with a rare and lovable rendering — dreamy and low-contrast wide open, surprisingly sharp at f/2 — wrapped in a well-built metal barrel, all for a fraction of what famous-name f/1.2 glass costs. Do NOT buy it if you demand clinical wide-open sharpness, high contrast, clean flare-free files, or if fringing in contrasty light bothers you — a modern lens does all of that better. And don't buy it impatiently: it's rare, so wait for a clean copy at a fair price. For the bokeh-obsessed vintage shooter, though, this sleeper Tomioka is one of the great bargains of the fast-fifty world.
https://www.pentaxforums.com/userreviews/revuenon-55mm-f1-2-mc.htmlhttps://www.borsuknabiwaku.com/blog/revuenon