http://forum.photozone.de/index.php?/topic/711-pentax-18-135mm/See what Klaus, owner/reviewer/editor of the PZ commented and wrote "preliminarily", a few quotes:-"I'm sort of disappointed. I expected more from a 700EUR lens.""The centering quality is alright for such a lens. Such a complex lens is never really perfect, of course. The field curvature at 18mm is an issue and the borders/corners at
