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July 23, 2007 – Sigma last week announced the launch of two new electronic flash units, the EF-530 DG Super and the EF-530 DG ST. Compatible with most major camera bodies, according to a July 20th press release, the new Sigma flashes support TTL auto exposure systems by makers Sigma, Nikon, Canon, Sony, and Pentax. Both the EF-530 DG Super and DG ST have a guide number of 53 per meter at ISO 100 and cover a focal length of 24mm to 105mm.
The DG Super edition flash is capable of a range of functionality, including modeling flash function, multi pulse flash, TTL wireless flash, FP (high speed) flash, rear-curtain Synchro flash, and manual flash in which the user can control up to eight stops. The Sigma EF-530 DG ST also features TTL automatic flash exposure with auto zoom, which sets the flash illumination based on the lens’ focal length.
The Sigma flash units accept four AA alkaline, NiCd, or Ni-MH batteries. Pricing and availability for the EF-530 DG Super and EF-530 DG ST have not yet been announced.