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The Sigma EM-140 DG Ring Flash for Nikon AF cameras 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 functions are also available for advanced flash photography.
55mm and 58mm adapter rings are included with the flash; 52mm, 62mm, 67mm, 72mm and 77mm adapters are sold separately.
Fully dedicated with i-TTL/D-TTL with Nikon photo or Digital cameras
Wireless TTL flash control (4 channels)
High Speed Synchro flash
Stroboscopic effect (power level and frequency customizable)
Modeling light, also provides AF assist
Backlight illuminated LCD panel