EM 140 DG Macro Flash The EM-140 is designed to work with both AF 3.5cm. film & Digital SLR cameras of all-popular manufactures. The EM-140 is ideal for photographing subjects in fine detail when the shadowless mode is used & is extremely effective for scientific & medical applications. Dual flash tubes can fire simultaneously or separately. Using only one flashtube creates shadow which can give a three-dimensional feeling to the subject. The flash features a guide number of 14 w/ISO 100. The Modelling Flash function makes it possible to check for reflections & shadows before actually taking the flash picture. A wireless flash function is also available when the EM-140 DG is used as master & the EF-500 DG SUPER as a slave unit for creating fine shadow details. High Speed Synchro & Exposure compensation functions are also available for advanced flash photography. Ideal for Close-up photography especially medical & scientific applications. Fully dedicated with the latest TTL auto exposure systems. Flash tubes can be switched on or off for creative flash control Wireless Flash Control High Speed Synchro Flash.