Pentax is no issue with AF lenses :
Nikon and Canon ?
I know that with Canon you have to be careful of old 35mm Autofocus lenses , They don't work right in Digital SLR bodies ...
Nikon is the same , is the AF drive in the lens or body , does what body support what lens ?
Pentax on the other hand should be safe with just about any K mount lens : ( Almost )
There are some lenses out there that need to be modified to fit a DSLR body or function correctly ... ( Manual Focus for 35mm Bodies )
I have one such lens ( Don't remember which one ) and it needed modifying to work ... ( Grinding away with a motor tool some excess metal )
Last edited by old4570; 12-30-2014 at 12:03 AM.