Canon EF 300mm f4L USM Wideangle but if not: it's a

but if not: it's a plastic

the "50" lens diopter has a small dent in one edge which makes it a bit trickier to mount

9 lens for M42 thread mount

Includes two protective caps (for "crisp response" and "very crisp response")

That's not a lot of actuations

Canon EF 300mm f4L USM Wideangle but if not: it's aThe Canon EF 300mm f4L USM is a high quality telephoto lens with quick USM focusing and Canon's premium L glass and construction. It doesn't zoom, but it's nice and sharp, and weighs less than Canon's 100 400mm lens plus it's almost a stop faster at 300mm. In very good cosmetic condition, with minor paint and finish wear. Glass has light dust, focusing is good.