The Sigma EM-140 DG Ring Flash is ideal for photographing subjects in fine detail - close-up photography - and is extremely effective for scientific and medical applications.
Dual flash tubes can fire simultaneously or separately. Using only one flashtube creates modeling, which can give a three-dimensional feeling to the subject. The Modeling Flash function makes it possible to check for reflections and shadows before actually taking the flash picture.
A wireless flash function is also available, where the EM-140 DG is used as master and the EF-500 DG Super as a slave unit for creating fine shadow details. High Speed Synchro and Exposure compensation functions are also available for advanced flash photography.
|Guide No.||46' (14 m)|
|Number of Flashes||2|
|Max Usable Diameter Size||77mm|
|Angle of Coverage||80 degree (vertical/horizontal)|
|Vari-Power||Yes; Full, 1/2, 1/4, 1/8, 1/16, 1/32 & 1/64|
|TTL Dedication||Yes; E-TTL II|
|Recycle Time||6 seconds with alkaline batteries
4 seconds with NiMH batteries
|Power Source||4 AA batteries|
|Weight||15.1 oz (430 g) [without batteries]|