SMC Pentax-F 50mm f1.7 format_16mm It has a 6 megapixel

It has a 6 megapixel CCD sensor with a built in shake reduction system and takes four AA batteries

but the viewfinder is substantially improved

and an accurate shutter

and a less structured top compartment roomy enough to carry larger accessories (or lunch and an extra sweater

and so will not autofocus on D3xxx

SMC Pentax-F 50mm f1.7 format_16mm It has a 6 megapixelThe SMC Pentax F 50mm f1. 7 is a compact standard lens for Pentax K mount cameras, with autofocus linkage for cameras with focus motors in the body. Naturally, this lens can also be focused manually on older K mount cameras. In excellent condition, with minor cosmetic wear, smooth focusing, good diaphragm action, and clean glass.