-Equivalent to a 28-135 mm lens, this new EF-S lens brings true camera lens to tele coverage to Eos 60D, Eos 7D and Digital Rebel cameras. it's Canon's Image Stabilization system, permitting safe hand-holding at hastens to 3 stops slower than otherwise attainable. And in fact, it's optically optimized for digital SLRs. A ring-type USM suggests that each quick and silent AF, furthermore as regular manual focus once within the AF mode.