Sigma 18-200mm f/3.5-6.3 II DC OS HSM Lens for Canon

Comments:

The Sigma lens mounted properly onto the 5d. But due to different lens construction, the plastic casing created a vignette around the picture frame at all zoom lengths. Also, when zooming it would snag and not go in and out smoothly. Not recommended for the 5d. The lens may work well with other cameras but it is definitely not compatible with the EF mount.

Comments:

I have the Tamron 18-270 VC PZD and I had the Nikon 18-200 VR. This lens (the version II) is sharper both of them. It focuses quickly and quietly. Its build quality is better than the Tamron and close to the Nikon. It's noticeably lighter than the Nikon and the same weight as the Tamron PZD. It's also considerably less expensive than either of them. It's 70mm shorter than the Tamron, but it's so sharp that you can easily make up the difference and more by cropping. If you're looking for a superzoom, you should consider this one first.

Comments:

Had the Canon 18-135 IS before. I also own the 55-250 IS. Seems to be on par with both of those lenses. I like the great focal length/convenience that this lens provides in a very compact package. I've gotten desirable results so far.