Originally posted by johnha I guess they did not mention Ricoh/Pentax because they did not fall for the mirrorless trap... I am the proud owner of a yellow K-01. Works lovely with small sized primes, but never with any zoom, except the for 18-55, because it is lightweight. My experience is that a zoom requires a body with some weight for smooth focusing. And zooming works best with a camera that you hold close to your body, so a DSLR. The only mirrorless to contradict this is the Samsung NX100, which works lousy with the 50-200 zoom, but works easy with the 18-200.
I conclude that on the basis of this article that Ricoh/Pentax is of a different class.