DPReview has some information on the new Sigma 50-150mm/f2.8. In Nikon terminology, this is a DX type tele zoom with VR: http://www.dpreview.com/news/2011/2/8/sigma50-150 I suppose this is a good news/bad news situation. This lens is clearly the "DX equivalent" of the popular 70-200mm/f2.8 zoom, with VR, that plenty of people want for their DX DSLRs. Assuming that the quality is similar to its bigger brother the Sigma 70-200mm/f2.8 OS I reviewed for photo.net, this new lens would be a great addition at $1099. The thing is that this new DX lens uses 77mm filters, so it is clearly not small. The length specification is 197.6 mm/7.8 in, which is almost as long as Nikon's 70-200mm/f2.8 AF-S VR II. For those who are looking for a 50-150mm/f2.8 because that should be considerably smaller than a 70-200, this does not look like the case at all. This lens is available in three different versions: Sigma mount, Canon EOS mount, and Nikon F mount. There are no Sony and Pentax versions at this point, but they could be added.