Sigma CANON18200MOUNT

Pros: Small, compact. Good optics for such a wide range.

Cons: Soft corners at 18mm wide open. Canon version must be focused parfocally above 135mm.

The Bottom Line: Optically good despite vast zoom range; much better than Tamron version. At 200mm, I must focus parfocally (focus at 135mm, shoot at 200mm) to get correct focus.

Review: I am resubmitting this review, with some revisions, because for some reason, my original review no longer appears under the product listing for this lens. This has happened at least a half-dozen times over the last year, and seems related to Epinion's ...

Pros: Small, compact. Good optics for such a wide range.

Cons: Soft corners at 18mm wide open. Canon version must be focused parfocally above 135mm.

The Bottom Line: Optically good, despite vast range. At 200mm, I must focus parfocally (focus at 135mm, shoot at 200mm) to get sharp pics. Optics much better than Tamron version.

Review: Epinions doesn't allow embedded photos, which is a shame for camera/lens reviews where the photo is the final product. Hence, I've posted a photo-enhanced summary of this review on my Geocities site: ...