Sigma Lens EF 500 DG Super Electronic Flash for Canon SLR

The EF 500 enables full automatic flash photography by TTL automatic flash exposure control and includes S-TTL flash photography for Sigma, 3-D multi-sensor balanced fill-flash function and i-TTL flash photography for Nikon, E-TTL II flash photography for Canon, and ADI flash photography and P-TTL flash photography for Minolta.

For bounce flash it can be tilted 90 degrees upwards and 7 degrees downward for close-ups. It can also be swiveled 180 degrees to the left and 90 degrees to the right. The EF 500 incorporates "modeling flash" mode to provide proper light distribution to check the shadow of the subject. The multi-pulse flash features enable reduced power setting from 1/4 to 1/128 in 6 steps, and the pulse frequency of the flash can be set from 1 Hz to 199 Hz. The EF-500 incorporates wireless TTL flash photography, slave flash photography, and FP flash photography (synchronized with high shutter speeds). In addition, manual flash also can be set at eight output power levels. The covering focal length of the flashlight can be seen on the LCD panel, and a flash ready signal can be seen in the viewfinder. The EF-500 also incorporates auto power off system.

The flash runs on four AA alkaline or four NiMH batteries (not included). Average use provides up to 220 flashes when using alkaline batteries and 100 flashes when using NiMH batteries, with an approximate six-second charge time with alkalines and four-second charge time with NiMH. The EF-500 weights 11.83 ounces and measures 3.0 x 5.5 x 4.6 inches (W x H x L).