Featuring a splash, dust, and freeze-proof construction, the STF-8 Twin Flash from Olympus offers shooters a completely weatherproof macro flash option. Design with full TTL support for Olympus cameras, this twin flash will help users more easily illuminate their close-up subjects. Also, it features adjustable ratios to help control the contrast of the scene and how much light is coming from each side. The flash heads are designed to provide plenty of light, with a twin flash featuring a guide number of 27.9' at ISO 100 while a single head features a guide number of 19.7' at ISO 100. Additionally, it will cover a 12mm lens on Micro Four Thirds format camera and each flash head can be tilted from -40 to 60°.