I’m a Pentax fan and this new lens has me reaching for my wallet. I generally use my 50mm and 28mm lenses these days and leave the kit lens, 18-55mm, at home. It’s not a bad lens, but my 50mm is sharper and faster. The 28mm is great as well, but it’s MF and I haven’t really had the time to learn how to meter down with it.
Anyway, the 17-70mm f/4 lens equates to a 26mm wide angle to 107mm telephoto after conversion to 35mm format. It will ship in July for $600.