sm-02-05-02
the FA limiteds (nuff said)
SMC-FA 85mm f/1.4 (legendary!)
SMC-FA 50mm f/1.4 (among the best if not THE best... it's a matter of taste)
the new DA limiteds, may not be THE best, but they are pancakes, and thats what makes them special... sometimes, the best lens is the one that weighs less... what other brand offers lenses so small?
and so on .....
as far as zoom I don't know... the best pentax zooms (DA*) are weather sealed and that is what makes them stand out from offering from CaNikon
the DA*50-135 f/2.8 is excellent... but the best? dont know..
the new DA*60-250 f/4 could be a new star rising for Pentax...