Pentax's A-series mild-wide prime — a manual-focus 35mm f/2.8 with an 'A' aperture setting.
The SMC Pentax-A 35mm f/2.8 is a wide-angle prime for the Pentax K bayonet mount, from the A-series generation with the 'A' aperture position that enabled program and shutter-priority modes on compatible bodies. It updated the earlier 35mm with electrical aperture control.
This is a manual-focus lens with a 35mm focal length and a maximum aperture of f/2.8, carrying Super Multi Coating and an 'A' setting that hands diaphragm control to the camera. Element count and filter thread should be verified on the individual lens rather than assumed.
At 35mm with an f/2.8 aperture the lens covers street, travel, landscape and general shooting with a mild wide field and a natural look. The extra speed over the f/3.5 versions helps in lower light and gives a brighter viewfinder image.
A-series primes remain popular because the 'A' contact enables aperture automation on later Pentax film and digital bodies. Confirm the 'A' position locks in, inspect for haze and fungus, check that the aperture is dry, and test ring feel. It fits Pentax K digital cameras and adapts to mirrorless.