[robski]

A review of the lens

http://www.photozone.de/8Reviews/len...3556/index.htm

As Stephen has said I would take your camera in and take some test shots and examine at home before buying. (especially at the long and wide ends of zoom - include a door frame in the shot to check for degree of barrel & pincushion distortion)

Out of the 30 or so members of Jessops staff I've dealt with over the years I would say that only 2 of them were photographers and actually knew what they were talking about.

In recent years Sigma have pulled their finger out on the EX range but the cheap range mainly suffer from slow AF and poor build quality.

Personally I would question the logic of putting a x7 or x10 zoom on a DSLR. You can pay a high price in terms of image quality and distortion to get a wide zoom range. But if you must have a wide zoom range so be it.