The Olympus FL-300R a new flash for Four Thirds and Micro Four Thirds cameras. With a guide number of 20 (in metres at ISO 100), the Olympus FL-300R flashgun features an approximately 75° angle of coverage (equivalent to the diagonal angle of view of a 14mm lens on FT/MFT or a 28mm lens on a 35mm camera). A built-in wide panel allows the flash to be used with ultra-wide lenses such as the M.Zuiko Digital 9-18mm f/4-5.6 (read review), although it does reduce the range by some 40%. This extremely compact unit measures only 56.4mmx89.2mmx26.9mm (WxHxD), weighs just 97 grams, and runs on two AAA sized batteries. The flash, which can also be used as a master or slave in wireless mode, comes with its own stand and soft case, and is available for approximately £140.