Promaster 8469 170SL Speedlight- Sony 35mm Film Five extra-low dispersion elements are

Five extra-low dispersion elements are featured in the lens design and help to control chromatic aberrations and reduce color fringing for increased clarity and color fidelity

A revised mechanism is more compact and convenient

By removing reflections

0 is designed for pro size DSLRs such as the Nikon D3/D4 series or the Canon 1D/1Ds series

shaky movement

Promaster 8469 170SL Speedlight- Sony 35mm Film Five extra-low dispersion elements areThe ProMaster 170SL Speedlight works with your camera to add light where you want it. It automatically adjusts its exposure and light beam to match your camera and lens settings. The articulating head can be adjusted for a variety of swivel and bounce positions; and is compatible with many light modifiers. The 170SL's powerful guide number of 52m 171ft combined with 180mm zoom head can illuminate subjects from afar. The built in wireless system