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Sigma releases the Electronic Flash Macro EM-140 DG for Sony Digital SLR cameras. The Flash unit is also available for Sigma, Canon and Nikon cameras. The unit is ideal for photographing subjects in fine detail when the shadowless mode is used, and is extremely effective for scientific and medical applications. Dual flash tubes can fire simultaneously or separately. High Speed Synchro and Exposure compensation is also available. 55 and 58 mm adapter rings are included, 52, 62, 67, 72 and 77 mm adapters are sold separately...
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