I have Vivitar's 28mm f/1.9 in screwmount and K-mount, and while it is compact, quite light and fairly small (58mm filter), it's not very wide. But it's a very nice performer.
Joe
Hi Gang ...
I just snagged a project that requires the use if a fast wide lens. I've an 18/3,5 but something faster would be more better. The A20/2.8 has always been of interest, and I can borrow one of those if that's what it comes down to, but is there something faster for the Pentax that may even be a bit wider than 20mm (a 15/1.4 would be VERY cool, especially if it took a 52,mm filter <LOL>). So, what's out there, especially in a manual focus lens, or one that affords a good manual focus feel.
Did I read here about a Sigma 18/1.8? I have such an aversion to Sigmas, Tokinas and Tamrons, but a lot of people here seem to use 'em, so maybe it's time to at least check one out.
Shel