The Leica SF 40 is a high-powered, smart little flashgun that adds a lot of dynamic light to your scene. It has been made to be specifically compatible with Leica's latest camera systems with TTL support for automatic exposure and metering. As a compact, user-friendly flash system, the SF 40 is an ideal companion when travelling. In regard to the SF 40's power output, it is rated with a guide number of 40m at ISO 100 and 105mm - ideal for illuminating a whole room or a specific subject. Further to this, it has a zoom range of 24-105mm (expanded to 16mm with pull-out diffusion panel), 90° upward/downward tilt, and a full 360° of rotation. This allows for complete bounce coverage, whilst the addition of a compatible commander unit can transform the SF 40 into a wireless remote flash system.