Sony 300mm f/2.8 G SSM II SAL300F28G2

(From Sony lens literature) Featuring a new high-performance optical design, a quiet high-speed SSM (Super Sonic Wave Motor) autofocus drive system with enhanced object tracking, and an anti-glare Nano AR coating, the SAL300F28G2 super telephoto Sony G lens delivers both high contrast and beautiful bokeh effects at levels far surpassing those of existing 300mm f/2.8 lenses. Take advantage of fast internal focusing and two DMF (direct manual focus) modes for tack-sharp images in any situation. Designed with outdoor use in mind, the front and back of the unit as well as the area around the focus ring are specially constructed to help prevent water penetration.