Last October, Tamron revealed it was working on a compact 70–180mm F2.8 telephoto lens for full-frame Sony E-mount camera systems. Now, we officially have availability and pricing information for the 70–180mm F2.8 Di III VXD.
As promised, the lens is small despite its focal length range, measuring in at 149mm (5.9″) long and 81mm (3.2″) diameter, with a weight of 810g (28.6oz). The lens is constructed of 19 elements in 14 groups, including one molded aspherical element, one hybrid aspherical lens, one ‘eXtra Low Dispersion’ (XLD) element, five Low Dispersion (LD) elements and fluorine coatings. The lens is ‘moisture-resistant,’ but Tamron doesn’t elaborate on what exactly it can endure.
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https://www.dpreview.com/news/1069624161/tamron-s-70-180mm-f2-8-lens-should-ship-in-mid-may-for-1-199
