The Fujifilm EF20 Shoe Mount Flash for FUJIFILM Cameras is a lightweight, portable on-camera flash with a 20' (6 m) guide number @ ISO 100. It provides coverage for lenses in the 24-105mm (in 35mm format) range. An EV Adjust button allows you to increase or decrease brightness when using bounce flash. The flash head rotates 45°, 60°, 75°, and 90° vertically for flexibility in directing your light. The EF20 is compatible with FinePix X100 / SL300 / SL305 / SL280 / SL260 / SL240 / HS30EXR / HS33EXR / HS25EXR / HS28EXR / HS20EXR / HS22EXR / FUJIFILM X10, FUJIFILM X-S1, FUJIFILM X-Pro1 cameras. It operates on 2x alkaline or 2x NiMH AA batteries. Batteries are not included.