Chinar Chinar 28mm f2.8 Heritage

Overview

The Chinar 28mm f2.8 is a budget third-party wide-angle from the era when numerous Japanese optical houses produced inexpensive lenses under a variety of brand names. The reviews note that it 'feels like a Cosina made lens; neither high end nor junk,' which is consistent with the practice of Cosina and similar contract manufacturers supplying rebadged optics. The Chinar name is closely associated with Chinon-branded products, and a closely related Chinon Auto MC 28mm F2.8 shares the same focal length and specification. No established nicknames or community jargon are evidenced in the reviews. Its appeal is primarily economic: reviewers describe it as cheap, lightweight, and capable of good results once stopped down, making it a practical entry into vintage wide-angle shooting for those on a tight budget. Note that reviewers explicitly state related Chinon 28mm lenses do not compare in rendering or sharpness to the Pentax K or M f3.5 equivalents.

Verdict: The Chinar 28mm f2.8 is a bargain-bin wide-angle for budget-minded vintage shooters and adapter users who want a lightweight, serviceable 28mm and are willing to stop down to f8 and correct color and contrast in post. It won't rival the Pentax 28mm primes in rendering or sharpness, but for the money it can produce good images in the hands of a patient photographer.

Optical Character

Bokeh

Okay at f2.8 and f4 but becomes busy from f5.6 up, with no bokeh fringing noted.

Color

Cool color rendition with slightly low saturation, often needing post-processing correction.

Sharpness wide open

Soft wide open at f2.8, tightens by f4, sweet spot at f8, with soft corners at all apertures.

Flare resistance

One reviewer found flare well controlled; related Chinon reported bad flare without a hood.

Contrast

Consistent but low global contrast; micro-contrast unknown.

Community Insights

What people love

Very cheap and good value for the money, capable of producing good shots
Lightweight and easy to carry
Sharp enough when stopped down to f8, requiring little sharpening in post
Simple internal construction that (on related Chinon copies) is easy to service

What people dislike

Soft wide open at f2.8
Corners soft at all apertures in at least one test
Low contrast and cool, slightly desaturated color requiring post-processing correction
Bokeh becomes busy from f5.6 upward
Does not match the rendering or sharpness of the Pentax K or M 28mm f3.5 lenses (per Chinon owner)
Handling can be awkward and critical focus difficult to judge (reviewer used a Nikon-mount copy on adapter)

Pro Tips

Shoot at f8 for the sharpest results; this is the reported sweet spot
Use a lens hood to control flare, especially on related Chinon copies where flare without one was reported as severe
Expect to correct color balance, contrast and saturation in post, but you likely won't need to lean on the sharpening tool when stopped down
Verify the mount fits your adapter snugly before relying on it for critical work

Sources (1)

Web-grounded synthesissecondary

The Chinar 28mm f2.8 is a budget third-party wide-angle from the era when numerous Japanese optical houses produced inexpensive lenses under a variety of brand names. The reviews note that it 'feels like a Cosina made lens; neither high end nor junk,' which is consistent with the practice of Cosina and similar contract manufacturers supplying rebadged optics. The Chinar name is closely associated with Chinon-branded products, and a closely related Chinon Auto MC 28mm F2.8 shares the same focal length and specification. No established nicknames or community jargon are evidenced in the reviews. Its appeal is primarily economic: reviewers describe it as cheap, lightweight, and capable of good results once stopped down, making it a practical entry into vintage wide-angle shooting for those on a tight budget. Note that reviewers explicitly state related Chinon 28mm lenses do not compare in rendering or sharpness to the Pentax K or M f3.5 equivalents.

https://www.pentaxforums.com/userreviews/chinon-auto-mc-28mm-f2-8.htmlhttps://www.robertallenkautzphoto.com/chinon/chinar-28mm-f2.8