Chinon Chinon 55mm f1.7 Heritage

Overview

The Chinon 55mm f/1.7 is a vintage standard prime for M42 screw-mount cameras, produced from the late 1960s to around 1975. Chinon was a respected Japanese manufacturer that built cameras and lenses both under its own name and for other brands, occupying the enthusiast tier: more affordable than pro systems yet more capable than the entry-level plastic bodies that came later. The lens is often attributed to Tomioka design heritage and is said to rival the sharpness and handling of contemporaneous Takumar and Yashica 55mm primes. It commonly shipped as the standard lens on bodies like the fully manual Chinon CX, which itself is quietly becoming a cult classic among modern film photographers. No established nicknames or community jargon are evidenced in the reviews. Its cult following comes from being genuinely overlooked and undervalued: reviewers describe it as a well-built, character-rich lens that in one wide-open comparison test actually beat an Olympus Zuiko 50mm f/1.4, with less ghosting around highlights. One reviewer regretted selling his copy 'for next to nothing,' praising its character, bokeh, and flares over the more expensive Olympus. Its M42 mount lets it adapt easily to modern mirrorless and DSLR systems.

Verdict: The Chinon 55mm f/1.7 is a hidden-gem standard prime for photographers who value character and value over spec-sheet bragging rights. Though half a stop slower than the ubiquitous f/1.4 fifties, it can beat them wide open with cleaner highlights, and it offers more interesting bokeh and flares — all for pocket change. It's ideal for portrait and artistic shooters, film photographers learning on M42 bodies like the Chinon CX, and mirrorless adapters chasing an affordable vintage look. Just budget time to service the notoriously oily iris.

Optical Character

Bokeh

Described as more interesting and characterful than an Olympus Zuiko 50mm f/1.4, using a 6-blade diaphragm.

Sharpness wide open

A relative weak point wide open at f/1.7, sharp at infinity from f/2.8 onward, and continues gaining detail through f/5.6.

Flare resistance

Noted for appealing flares and shows less ghosting around highlights than an Olympus Zuiko 50mm f/1.4.

Community Insights

What people love

Exceptional value for money — averaging around $29 and rated 10/10 on value by user reviewers, yet capable of beating pricier f/1.4 fifties wide open
More character than mainstream alternatives, with interesting bokeh and flares that make it a strong choice for creative projects
Cleaner wide-open rendering with less ghosting around highlights than an Olympus Zuiko 50mm f/1.4
Well-built, compact all-metal barrel with excellent handling (rated 9.7 handling by user reviewers)
Sharpness that keeps improving on stopping down, still gaining detail at f/5.6
M42 mount makes it easy to adapt to modern mirrorless and DSLR systems with no electronics or modifications

What people dislike

Wide open at f/1.7 is its relative weak point, and it doesn't improve much closing to f/2 while rivals gain more sharpness there
Prone to oily/stuck iris, a well-known issue with these lenses
Half a stop slower than f/1.4 competitors, which some assume makes it a lesser lens
Often overlooked and easily sold off cheaply — one reviewer regretted parting with his

Pro Tips

Stop down to f/2.8 or beyond for sharp results at infinity; the lens keeps gaining detail all the way to f/5.6
Embrace wide-open shooting at f/1.7 for its soft, slightly glowy portrait character and interesting flares rather than expecting clinical sharpness
Lean into its flare and bokeh character for creative and artistic projects where it outshines more conventional fifties
Pair it with a mirrorless body via a simple M42 adapter to exploit its rendering on digital

Sources (1)

Web-grounded synthesissecondary

The Chinon 55mm f/1.7 is a vintage standard prime for M42 screw-mount cameras, produced from the late 1960s to around 1975. Chinon was a respected Japanese manufacturer that built cameras and lenses both under its own name and for other brands, occupying the enthusiast tier: more affordable than pro systems yet more capable than the entry-level plastic bodies that came later. The lens is often attributed to Tomioka design heritage and is said to rival the sharpness and handling of contemporaneous Takumar and Yashica 55mm primes. It commonly shipped as the standard lens on bodies like the fully manual Chinon CX, which itself is quietly becoming a cult classic among modern film photographers. No established nicknames or community jargon are evidenced in the reviews. Its cult following comes from being genuinely overlooked and undervalued: reviewers describe it as a well-built, character-rich lens that in one wide-open comparison test actually beat an Olympus Zuiko 50mm f/1.4, with less ghosting around highlights. One reviewer regretted selling his copy 'for next to nothing,' praising its character, bokeh, and flares over the more expensive Olympus. Its M42 mount lets it adapt easily to modern mirrorless and DSLR systems.

https://www.vintagelensesforvideo.com/olympusvschinon/https://www.pentaxforums.com/userreviews/chinon-auto-55mm-1-1-7-m42.htmlhttps://dutchthrift.com/blogs/gear/chinon-cx-55mm-f-1-7-review-and-buying-guide