The lens is a 7-element, 7-group construction, featuring 6 aperture blades and an aperture range of f/2.8 to f/22. It has a minimum focusing distance of 0.30 meters, measures 64 × 57mm, accepts 55mm filters, and weighs approximately 284 grams. It was made available with M42, Pentax K, Minolta MD, Canon FD, Nikon F, Olympus OM, and Yashica C/Y mounts.
The lens was also marketed under different badges across the region, with the most notable being the Vivitar MC Wide Angle 28mm f/2.8, with serial numbers starting with "22" to denote its Kino Precision parentage.
On the Pentax-Km, the Kiron 28mm f/2.8 MC is equivalent to a 40mm lens on a full-frame camera. The focal length, often referred to as the "sweet spot lens for photography," provides a field of view that is more like a natural “normal” lens than a very wide one.
The focal length mimics human vision with minimal distortion, making it a very versatile option for capturing realistic scenes without feeling too wide or too tight, excellent for travel, street, and documentary photography, as well as for close-ups, architecture, and casual portraits.
In street photography, for example, the focal length helps capture the scene's atmosphere while enabling detailed compositions and framing. For environmental portraits, the lens offers enough field of view for context, along with gentle subject isolation and slight background compression.
With a closest focusing distance of 0.30 meters, crops and close-up shots with the lens are equally exemplary.
Images, as processed, are uniquely warm and vintage, sharp when stopped down, with minimal vignetting, flaring, or chromatic aberration. While not as razor-sharp when shot wide-open, the lens does evoke artistic qualities that legacy lenses have when compared to the clarity and sharpness favored by digital enthusiasts in modern glass.
The Pentax K-m (K2000 in some regions), an entry-level digital SLR camera fitted with a 10.2MP APS-C-sized CCD sensor, was introduced in 2008, with features that include a KAF2 lens mount system, has a built-in Shake Reduction (image stabilization) and dust removal system, an optical viewfinder with approximately 96% field of view and 0.85x magnification, a 230,000 dot 2.7-inch LCD screen, ISO sensitivity range from 100 to 3200, Auto Picture modes with scene recognition for portrait, landscape, macro, and night scenes, and is powered by 4 AA batteries (Lithium, Ni-MH rechargeable, or alkaline).
