Sigma announced the new 28-105mm f/2.8 ART lens

Preorders:
USA: Amazon, BHphoto, Adorama
Europe: FotoErhardt, FotoKoch, Calumet, WexUK.

Reviews:
Explora. PCMag. SonyAlphaBlog. Amateur Photographer. Herve Rannu. Bharat Kumar Prajapat. Product page at Sigma.

Youtube reviews: