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Compatible far with TTL flash systems Canon, Nikon and Sigma own, the latter firm has just announced the upcoming availability of a new version of its macro ring flash EM-140 3 way switches DG also valid for Sony cameras.
Sigma EM-140 DG Macro Introduced 3 way switches back in 2004, the veteran model keeps intact 3 way switches its features in this new designed especially for Sony Alpha system version. It has two independent flash tubes, and according to official specifications, supports fast synchronization systems and wireless TTL.
The flash includes adapters for 55 goals and 58 millimeters 3 way switches in diameter, respectively. However, as indicated Sigma, can also be acquired other rings to couple to optics 52, 62, 67, 72 and 77 millimeters.
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