In 1980 Pentax supplemented the 105mm standard lens with this slightly shorter 90mm lens with a horizontal field of view of 42 degrees. The lens was re-issued again in 1989 in the Pentax 67 cosmetic design, but with unchanged optical formula.
This is a USED lens. NOTE: Missing rear lens cap. Glass is clean. There is some wear on the rear mount, but nothing that would impact functionality. Overall good condition.