You asked
Best camera for the pentax smc da 50 200mm f 4 5 6 ed wr?
The Pentax smc DA 50-200mm is made for APS-C, so I'd pair it with an APS-C body. It frames like a 75-300mm on full frame, which is good reach for everyday telephoto work.
- Pentax K-3 Mark III: my pick if you want the best APS-C body here. It gives you the most room to work with this lens.
- Pentax KP: a strong choice if you want a compact, capable body without going to the top of the range.
- Pentax K-70: a sensible, lighter option if you're mainly shooting for fun and want to keep the kit small.
The lens isn't stabilised, so keep shutter speeds up when you're zoomed in. You can see the full lens details on its own page.
Written by Claude from this site's pages.