SMC Pentax-F 50mm f1.7 Matthews This size can be contact-printed

This size can be contact-printed onto a standard sheet of 8x10 paper

Maybe it's fun for someone's kids

This is a nice ultrawide lens with a fast f4 constant aperture and an image stabilizer for steadier shooting- yeah

4K and full HD video recording

8 lenses with 49mm filter threads

SMC Pentax-F 50mm f1.7 Matthews This size can be contact-printedThe 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, most notably initials engraved on the extending barrel; there's no effect on function, as you might imagine. Glass is clean, focus and diaphragm move well.