Hanimex — MC 24mm f/2.8 wide-angle prime, Makina Optical design in Pentax K and M42 fit
The Hanimex MC 24mm f/2.8 was the brand's wide-angle option for 1970s-80s SLR owners wanting wider than a standard 28mm. It was built by Makina Optical Co., a Japanese OEM house that also supplied the near-identical Makinon-branded lens and versions sold through Vivitar and Toyo Optics.
The lens uses a 9-element, 7-group formula, has a 55mm filter thread, and focuses to 0.25 metres. Hanimex sold it in Pentax K and M42 mounts; other period mounts are plausible but unconfirmed. Reported aperture blade count varies by source (8-10), and precise weight is undocumented, so both are omitted.
Wide open the lens shows pronounced corner vignetting clearing by around f/4, soft corners and mild barrel distortion. A distinctive trait is swirled background rendering at close focus, similar to Helios-lens bokeh and unusual on a wide-angle design. Flare control is weak, with warm-toned ghosting.
Because Makina Optical's design was rebadged across several brands, cross-checking Hanimex, Makinon, Vivitar and Toyo Optics listings can help when researching a purchase. It is inexpensive and a low-cost way to try swirly-bokeh rendering. Check for internal haze, a reported issue on early copies.