Can I use adapted lenses on the pentax k r?

Yes. The K-r uses the Pentax K mount, and old manual K lenses fit directly, so you don't need an adapter.

If you want a starting point from the catalogue, the Pentax smc DA 50mm f/1.8 frames like 75mm on this body, which suits portraits. For wide scenes, try the [Pentax smc DA 14mm f/2.8 ED [IF]](/gear/lenses/pentax-smc-da-14mm-f-2-8-ed-if/), which frames like 21mm. The K-r also has stabilisation in the body, which helps whichever lens you use. For the crop factor on any other focal length, use the focal length converter.

Written by Claude from this site's pages.