[davidmanze]

The lens producing industry should get a grip of it's quality control in general!  Tamron, Sigma, Pentax, etc. It should be a pleasure buying a new lens,personally I've found it disappointing,stressful and time consuming. In the seventies these problems rarely occurred. I know lenses are more complicated now,but it follows that the quality control should be more critical also.

   There's a lot to be said for Pentax's in body IS.