Extend the effective focal length of your telephoto Sony lens with this 2.0x Teleconverter, which doubles the reach of your system. The dedicated design maintains full communication between the lens and A-mount cameras, including auto-exposure metering and autofocus. 2.0x teleconverter doubles the reach of the lens with only a two-stop loss in exposure. Dedicated design maintains a high degree of image quality as well as full electronic communication to support the use of AE and AF. Compatible Lenses: 70-200mm f/2.8 G SSM II 300mm f/2.8 G SSM II 70-400mm f/4-5.6 G SSM II (manual focus only) 135mm f/2.8 STF (manual focus only) 500mm f/4 G SSM (manual focus only) 1 Year Warranty