Originally Posted by thibs
I dunno but the fact that it is "full frame" as such justifies in itself for nice price increase.
Until there is a full from dslr from Pentax, that is a Moot point. The autofocus is also a plus on the Pentax glass. And for film camera I'd probably just go with vintage glass. The exception is the Zeiss 85mm and 50mm.
I like Zeiss whether its cameras or microscopes but they aren't a clear cut winner here. I don't see that 18mm beating the Pentax 14mm on the k20d or k200d.