Hi, Bob, Gotta agree with you there. I have one Sigma, an older 80's vintage APO 3.5-4.5 50-200 zoom. It takes very nice pictures. Sharp, nice (but not the best) bokeh - optically very competent. Nice all metal barrel. But the aperture ring is plastic. Very flimsy plastic, such that one can easily deform it by using quite ordinary pressure on it while adjusting the aperture. One has to use a ~very~ light touch on it, because it deforms to the extent that it can be difficult to turn.
This, on what would have been a fairly expensive lens in its time. Luckily I got it on eBay for a song, but it really takes much of the pleasure out of using it, and makes me wonder how long it's going to last... I guess everything I've read about that famous "Sigma build quality" is true. regards, frank Bob Rapp wrote: > You too would come to the same conclusion if you had one fall apart on your > hands! (28-80 Sigma Zoom) > -- "The optimist thinks this is the best of all possible worlds. The pessimist fears it is true." -J. Robert Oppenheimer
