Makinon — 28-80mm f/3.5-4.5 manual-focus macro zoom lens for Pentax K, Canon FD and more
Makina Optical Co. of Tokyo supplied OEM optics to brands like Vivitar and Hanimex before selling lenses under its own Makinon name from 1974. This 28-80mm zoom was a mid-range, general-purpose lens sold through camera shops and mail order to manual-focus SLR owners into the 1980s.
Sold in Pentax K, Canon FD, Minolta MD, Nikon F and Olympus OM mounts, it covers 28-80mm at a variable f/3.5-4.5 aperture through a six-blade iris and a non-rotating 72mm filter thread. Weight runs roughly 490-530g depending on mount, and a macro switch focuses down to about 0.23m versus a 2-2.5m normal minimum.
Pentax K copies are described as heavy for a budget zoom, with barrel distortion and some ghosting at 28mm wide open, sharpening up with better colour by f/8. The non-rotating front element keeps polarising filters usable while zooming, and the macro switch gives closer focusing than fixed-mount rivals of the period.
It appears regularly and cheaply secondhand across its five mounts, most often in Pentax K and Minolta MD. Worth checking that the macro switch and zoom ring turn smoothly, that the aperture blades snap shut cleanly, and that the elements are free of haze or fungus after decades in storage.