Quote Originally Posted by Colin


It's good to know. Sorry. I know you were excited.


I got a second copy of the 135 that still has a backfocus problem. at about 30 feet, the focus is actually 3 feet behind where it should be. Unfortunately, my camera doesn't have micro adjustments for autofocus. It still takes nice pictures, but I had to play with picking focus points to set the autofocus that weren't the points that I wanted in focus (closer to me, pick the bridges of the nose, for example, to get the eyes in focus).


Now, it could be my camera, except that it works with my 35 1.4 and 85 1.2 just fine. when the 24-70 comes back to see if there was anything they could do with the chromatic aberration, I'll send back the 135 with my camera body and ask them to calibrate the ***. Hopefully, they can actually make it work correctly, and it's just a commonadjustment issue as noted in that lens rentals notice that somebody had the goodness of heart to post. Was it Daniel?


Then, there are other lenses, like the 50mm 1.4, that in some instances, regardless of calibration, just can't autofocus accurately, by design. I eventually traded that lens in, even though I liked what it could do in so many other ways. I would have liked to trade it in by hurling it into the back of the head of whoever decided that the 'feature' was acceptable.


I realize that every lens has performance variations, and trade offs are part of design, and I can accept that, but accurate autofocus would seem to be crucial. If I can't get accurate autofocus, it's pretty useless to me, particularly at f/4 and below. It's exceptionally frustrating.
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My 3 other lenses focus fantastically well with absolutely no MF adjustments necessary. Of course, they're all Canon lenses--and the manufacture didn't have to reverse engineer the autofocus mechanisms. I'm a portrait photographer, and I do most of my shooting sans a tripod. Accurate autofocus is an absolute must with me. I was perfectly fine forgiving the rather heavy CA that came with the lens, but I won't put up with mis-focused images. Oh, and my Canon 50mm f/1.4 focuses very well (not to rub it in, but here's a shot I took fairly recently with it).