Ed Nicholson , Feb 29, 2008; 10:04 p.m.
Just slap 'em on and shoot away. Pentax is very proud of the fact that just about all lenses with the Pentax bayonet mount can be used on all bayonet mount Pentax SLRs and DSLRs. Thje only problem is that Pentax M and A lenses won't give you the automatic exposure and focus features. But you can use tham by using the manual controls. Good Shooting!