A constant f/2.8 aperture across the 50-150mm range and compact, lightweight build define this telezoom, complemented by Hyper Sonic Motor autofocus for fast, quiet operation. Super multi-layer coating and an 18-element/14-group optical design maintain sharpness, while full-time manual focus override provides precise control. It’s ideal for Nikon APS-C DSLR portrait photographers wanting a fast, portable alternative to heavier 70-200mm f/2.8 lenses.