You asked
Is the pentax k s1 good for wildlife?
The K-S1 is a sensible body for wildlife, mainly because of its crop factor. Its 1.5x APS-C sensor and 20.1-megapixel resolution make a long lens reach further, and the body has in-body stabilisation, which helps when you're hand-holding a telephoto. Reach matters most in wildlife and sport, where the subject is usually far away.
For wildlife on this body, I'd look at these:
- Pentax HD D FA 150-450mm f/4.5-5.6 ED DC AW: the longest reach here, like 225-675mm on full frame.
- [Pentax smc DA* 300mm f/4 ED [IF] SDM](/gear/lenses/pentax-smc-da-300mm-f-4-ed-if-sdm/): a fixed telephoto, like 450mm on full frame.
- Pentax HD D FA* 70-200mm f/2.8 ED DC AW: a bright zoom for closer animals and action.
Good telephoto lenses hold their value, so buying used is an easy way in.
Written by Claude from this site's pages.