Tamron 70-210mm f/4 DI VC USD officially announced, ready for pre-order at $799
Tamron 70-210mm f/4 DI VC USD at a glance: Constant F/4 maximum aperture Best-in-class 1:3.1 maximum magnification ratio and 37.4" MOD High-speed Dual MPU (Micro-Processing Unit) Outstanding 4-stop VC Image…