| The lenses will work just fine on any modern Pentax DSLR with a screw mount to K-mount adapter. You'll have to focus and set the exposure manually, but you'll be able to use the built-in light meter to determine what the exposure should be. And since the shake reduction on Pentax DSLRs is built into the body (and not into the lens as is done in Can*n and Nik*n cameras), these lenses will benefit from that.
The most important thing to understand is that the digital sensor is smaller than a piece of 35mm film, and this means that you'll only be using the central portion of the lens's image. The effect in terms of field of view is similar to using a focal length that's 1.5X longer than than that marked on the lens. So, for example, your 28mm wide angle lens will actually give you a field of view that's about the same as a 42mm lens on your Spotmatic. |