SMC Pentax-M 40mm f2.8  type_Lens Cap This lens will not cover

This lens will not cover 4x5- it will definitely cover 6x9cm medium format or smaller

and some of the best lenses ever made- including the 45mm f2 Carl Zeiss Planar lens that comes with it

Out in the country

with only very minor haze in the front cell

with surprisingly good close-focusing abilities

SMC Pentax-M 40mm f2.8 &nbsptype_Lens Cap This lens will not coverThe SMC Pentax M 40mm f2. 8 is a very, very tiny pancake lens for Pentax K mount cameras. It's under 2cm long, and it still packs a real mechanical aperture control and a smooth moving focusing ring. Use it on any Pentax K mount camera, film or digital. In good cosmetic condition, with light paint and finish wear; clean glass, with minor dust.