Lots of lens slip, but still Canon 06/21/2013
This review is from: Canon EF 28-135mm f/3.5-5.6 IS Image Stabilizer USM Autofocus Lens + Filter Kit + Lens Cap Keeper + Cleaning Kit + Camera Holster Case, Compatible with ALL Canon EOS Digital SLR Cameras
Pros:
Good build quality, nice results that are consistent with the rest of this range. Decent image stabilization.
Cons:
Bad lens slip (focal length zooming due to loose gearing), noisy image stabilization motor
Overall Review:
This is part of Canon's middle of the pack EF series. I have found it's build quality to be good, not great (on par with other EF lenses), reliable performance, and predictable results.
It's image stabilization works well, but is rather noisy if things like that are important to you. It doesn't have a fixed aperture so not the "best" lens for video work.
My biggest issue with this lens, and I have read that other people have had this issue, is it's lens or zoom slip. If I hold this lens upside down (with the lens end down), it will zoom all the way to it's 135mm length. It is not meant to do this and has proven annoying at times. Mostly, it adds wear to the zoom system and will reduce the life of your lens slightly.
It's a good walk around lens, but I'd definitely look closer at some other products like Tamron if I were going to purchase again.
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