You asked
What lenses should I buy for the pentax kf?
For an everyday kit on the KF, I'd start with the Pentax smc DA 18-55mm f/3.5-5.6 AL WR. It covers most daily shooting at a sensible price.
Beyond that, depending on what you shoot:
- Pentax HD DA 16-85mm f/3.5-5.6 ED DC WR: one lens for travel, if you'd rather not swap lenses.
- Pentax smc DA 50mm f/1.8: a cheap, fast prime for portraits and dim rooms.
- Sigma 30mm f/1.4 DC HSM Art: if you want a fast prime for low light and shallow depth of field.
The KF has stabilisation in the body, so it helps with any of these. To work out how a lens frames on this camera, use the focal length converter.
Written by Claude from this site's pages.