Sigma has produced a 18-35mm zoom lens with a constant f/1.8 aperture throughout the zoom range. While it only covers an APS-C sensor, Sigma is still the first to offer this kind of lens to DSLR users.
The lens contains 17 elements in 12 groups. The aperture range covers f/1.8 max down to f/16 min. It has a 72mm filter size and a minimum focusing distance of 11-inches. There are 9 aperture blades, which produced a rounded diaphragm. The lens weighs 810g (or 28.6 oz.). No word yet on pricing though.
Sigma is really knocking it out of the park with its latest series of lenses. The new 35mm f/1.4 DG HSM is getting rave reviews, and I am loving the little budget 17-70mm f/2.8-4 replacement kit lens on the Nikon D7100. If this new 18-35mm f/1.8 continues the trend, there could be a new lens sheriff in town.
Your move Canon and Nikon.
[via Sigma Global]