On November 25 last, Tamron announced the launch of the successor of its very respectable 200-500mm f/5-6.3 ultra tele-zoom, the Di SP 150-600mm F/5-6.3 VC USD, the first afficionado super tle at under $1500   On November 25 last, Tamron announced the launch of the succesor of it's very respectable 200-500mm f/5-6.3 ultra tele-zoom (test here), the Di SP 150-600mm F/5-6.3 VC USD. What does that letter-soup stand for, you wonder? Di means “Digi… more »