1.6 f-stop aperture coefficient 1/32-1/1 precise control 2.metal shell,sturdy and durable 3.General Mini mount Mini Studio Flash GE seriesFeatures 1. CE certified products, 2. 6 f-stop aperture coefficient 1/32-1/1 precise control, 3. Flash delay and red eye prevention meets the need comprehensive needs of photographers, 4. Full function of modeling bulb control,proport/full/off, 5. Mini mount, 6 ...