The tamron af18 270mm f35 63 di ii vc pzd af lens for sony is a 15x high power zoom lens designed exclusively for digital slr cameras using the more compact aps c digital size image sensors the focal length of this lens is equivalent to approx 28 419mm in 35mm format designed as an all in one lens it will meet almost all photographic opportunities without changing lenses the addition of pzd piezo drive ultrasonic autofocus motor helps make this lens lighter shorter and slimmer tha