This flash gun is extremely versitile as it can be used for zomm and macro flash. The TTL flash control automatically provides the correct power output ensuring even exposure every time. The macro flash fits to the front of the lens using the 52mm and 77mm adapters provided. (Other adapters are available at extra cost). Guide No: Zoom Flash 34/ISO100 Guide No: Macro Flash 6/ISO100 1 side illuminated and 8.4 with both. Zoom Head: 28, 35, 50 and 85mm Manually adjusted Bounce Angles: 0 / 30 / 45 / 60 / 60 Degrees AF Beam: From 1 to 5 Metres Flash Duration: 1/5000s to 1/30,000s (approx) Flash Recycle: 0.5 to 7seconds (approx) No of Flashes: 150-2000 (approx) Colour Temp: 5.500K (Corresponds with daylight) Measures: 85 x 73 x 120mm Weight: 250g (Without batteries) Power: 4 X AA (1.5V)