Sigma 28-45mm f/1.8 preorders links:
In USA at Amazon, Bhphoto, Adorama.
in EU at FotoErhardt, Calumet, WexUK.
Reviews:
Review at Explora. Review at SonyAlphaBlog. French review at Alphadxd. Product page at Sigma. Test by Yuichiro Fujishiro. Test by Jack Redgate.
Youtube reviews:
