You asked
Pentax k r vs pentax k 5?
The K-r and K-5 are close cousins. Both are Pentax K-mount APS-C DSLRs announced in 2010, both have in-body stabilisation, and they take exactly the same lenses. The main difference is resolution: the Pentax K-5 has 16.3 megapixels, while the Pentax K-r has 12.4. If you want room to crop or print large, I'd take the K-5.
For an everyday kit on either body, I'd start with the Pentax smc DA 18-55mm f/3.5-5.6 AL WR for general use. Add the Pentax smc DA 50mm f/1.8 for portraits and low light. If you want a faster zoom, the Pentax HD DA* 16-50mm f/2.8 ED PLM AW keeps a wide aperture across its range.
For help with focal lengths on APS-C, see the lenses guide.
Written by Claude from this site's pages.