Hello everyone! A couple of digests ago I read this: ....... Just last weekend I purchased a 75-150/3.5 Series E at a camera show (one that's been mechanically reworked to solve the loose zoom problem so common with these lenses)............... I have come across one of these lenses, and having read that it is very sharp, I am considering of trading it for my current 50-135/3.5 AI-S, but I am worried about this "loose zoom problem".... can someone explain what is that all about? I would appreciate also any opinions on whether I shoud trade my zoom or not..... Thank you very much Marc
