With two 10-20mm lenses already within the Sigma stable, how exactly does this superwide offering fit into the line-up?

Excellent 8mm performance

Weaker 16mm performance

Sigma has embraced the ultra-wide sector, offering 4.5mm, 8mm, 10mm and 15mm prime lenses as well as 10-20mm zooms in variable aperture (f/4-5.6) and fixed aperture (f/3.5) versions and a 12-24mm zoom. There is also this new 8-16mm zoom.

Excellent 8mm performance

Weaker 16mm performance

Yes, I would recommend this to a friend

Color; Very little flare; Very Sharp

No Filter; Poor in Low Light; Slow aperture

Optimized to work where you'll probably be using it, there's not much more to say here that the review doesn't cover. If you need ultra, ultra-wide, you won't go wrong with the Sigma 8-16mm, and at present, there's not a whole lot else to choose from.

Announced at PMA 2010 in February, the new Sigma AF 8-16mm f/4.5-5.6 DC HSM lens is designed specifically for DSLR cameras with APS-C size image sensors and boasts the widest angle of view of its type.

good lens, excellent results.

Consistent Output; Durable; Easily Interchangeable; Fast / accurate auto-focus; Lightweight; Rugged