Quote Originally Posted by TheFlyingCamera View Post
Pentax K mount seems like a slightly odd choice
Pentax K and Nikon F are the only two lens mounts that (a) have been in use for more than 30 years and (b) are still current on DSLRs. PK is also really easy to implement from an engineering point of view.

The KX/MX/LX crowd together with those Pentax DSLR users who want more high quality prime options ought to be plenty enough to make this line successful. The 25 in particular fills a critical gap in the semi-wide range for APS-C.