I just received a 28-70mm f/2.8 and quickly noticed a design flaw with the
lens. When you extend the lens to 28mm, and shoot straight up, the weight
of the front elements combined with the vibration of the mirror causes the
lens to zoom out. The same type problem exists when shooting straight down.
I can't believe the zoom creep. Has anyone else experienced this problem?
Thanks,
Michael
www.mrhphoto.com
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