Just when I decided that my DA * 16-50 was okay (IQ-wise still is, I think), I noticed that when zoomed out, the extension tubes wobble (is this the correct word?) a little -- that is, when I grab the lens gently from the filter-holder-ring I can move the extension tubes sideways some fractions of a millimetre, so that at least the outer front lens moves a little against the lens axis. As far as I can observe the inner lens groups stay firm.
I have not noticed any effect to IQ or focusing, but this has begun to bother and I really hate having to worry about my lenses. My Tamron 18-250, which extends to really great lengths, does not wobble at all. I would have expected this DA * to be even more robustly build.
What do you think, if I decide to take it to Pentax representative for repair, can I claim the repair to be included in the warranty? Must I tolerate any wobbling from this lens?
Last edited by gawan; 02-05-2008 at 03:42 PM.
Reason: language