Kiron's fast wide-angle for C/Y mount — the 28mm f/2 with good optics at a budget price.
The Kiron 28mm f/2 Wide Angle is a fast wide-angle prime from Kino Precision Industries (Kiron), a Japanese third-party lens manufacturer that produced high-quality optics in the 1970s–1980s. Kiron lenses were marketed under the Kiron brand and also as OEM products for Vivitar and other labels. This example is in Contax/Yashica C/Y mount.
The lens delivers 28mm at f/2 maximum aperture with C/Y bayonet coupling, manual focus and aperture operation, and multi-coated optics. The f/2 maximum aperture for a 28mm was fast for a third-party lens of this era and was one of Kiron's competitive differentiators.
Kiron's 28mm f/2 was regarded as one of the better-quality third-party wide-angle primes of the early 1980s, competitive with Zeiss and Yashica's own C/Y-mount offerings at a lower price. The C/Y mount is widely adaptable to modern mirrorless systems, giving this lens continued usefulness for photographers wanting a fast vintage 28mm on Sony FE, MFT, or similar mounts.
Test aperture ring operation for smooth click-stop transitions. Inspect element condition for haze, fungal spotting, or coating damage — common in stored vintage lenses. Check C/Y bayonet coupling for positive engagement. Verify focus ring operates smoothly from minimum focus to infinity. For modern adaptation, confirm C/Y adapters are available for the intended mount.