Is the pentax hd da fish eye 10 17mm f 3 5 4 5 ed worth it?

Whether it's worth it depends on whether you want the fisheye look. This is a zoom from 10 to 17mm on APS-C Pentax K bodies, and on those cameras it frames about like a 15 to 26mm lens on full frame. It has autofocus but no stabilisation, and it gets darker as you zoom in, so it's a specialist lens, not an everyday one. If you shoot interiors, architecture, skies, or anything where you want that strong curved distortion, it's a fun and useful tool. If you mostly shoot people or travel scenes, it will probably sit in the bag.

You can see the full list of compatible bodies on the lens page. For a quick look at how crop sensors change what a lens does, read sensor sizes.

Written by Claude from this site's pages.