Looking at getting a flash really soon. I noticed on adorama website they have a Sigma EF-530 listed not in stock yet. Dose anyone know how this compares to the Sony 56 model? The speck for the sigma is as follows. http://www.adorama.com/SG530STSO.html Guide Number @ 24mm - 92 ft / 28 M @ 28mm - 95 ft / 29 M @ 35mm - 102 ft / 31 M @ 50mm - 132 ft / 40 M @ 70mm - 149 ft / 45 M @ 85mm - 158 ft / 48 M @ 105mm - 174 ft / 53 M Power SourceFour AA alkaline or AA NiCd or Ni-MH (Nikel Metal Hybride) batteriesVariable PowerFull to 1/16Recycle Time6 seconds (when using alkaline batteries) Approx. 4 seconds (when using NiCd, Ni-MH batteries) Number Of FlashesApprox. 220 flashes (when using alkaline batteries) Approx. 100 flashes (when using NiCd, Ni-MH batteries) Illumination AngleAutomatically set in accordance with the focal length of the lens, in a range from 24 mm to 105 mm. Also covers the angle of a 17-mm lens when used with the built-in Wide Panel.Bounce Angle (Up)0, 60, 75, 90 degreesBounce Angle (Right)0, 60, 75, 90 degreesBounce Angle (Left)0,60,75,90,120,150,180 degreesTilt angle (Down)0, 7 degreesDimensions (W X H X D)3.0 X 5.5 X 4.6 inch / 77 × 139 × 117mmWeight10.8 oz. / 305g (without batteries) The sony is: http://www.adorama.com/ISOHVLF56.htm...ony&item_no=16 Type:Auto Locking Accessory Shoe ConnectionGuide Number:56 (at 85mm position, ISO 100)Zoom Range:24mm to 85mm, 17mm with wide panelBounce Capability:Able to bounce up and downSwivel Capability:Yes, left and rightAuto Settings:Auto zoomDimensions (W x H x D): 3 1/8 x 5 1/4 x 4 inches (W 77.5 x H 131 x D 99.5mm) Weight:Approx: 13.1oz (370g)Special Features:High accuracy ADI in combination with D Lens (lens with built-in distance encoder) High-speed synchronization feature for synching with high-speed shutters Power supplyAA batteriesWireless FlashYesWide Angle PanelCovers angles of field up to 17 mm lens when using included wide panel Any help from you guy with more exp would be great inwich flash will be better.