Is the pentax hd fa 35mm f 2 worth it?

Yes, if you want a sharp, simple prime for a Pentax K body. I'd call it a solid everyday lens rather than a specialist one. Its page lists it as a full frame lens, and it fits both full frame and APS-C Pentax K cameras.

The framing depends on your body. On full frame it's a true 35mm, a little wider than a standard 50mm, which suits street, travel and environmental portraits. On APS-C it frames like 52mm, so it's longer than the 33-35mm APS-C prime I suggest in the first lenses guide. It's still useful there, but it's a different tool.

It isn't stabilised, so keep an eye on shutter speed in dim rooms. If you're weighing the full frame body that pairs with it, sensor sizes walks through when that's worth the cost.

Written by Claude from this site's pages.