Sigma EF-500 DG Super SA-N Flash, a dedicated external flash unit for Sigma SA-mount cameras (both 35mm AF SLR and Digital SLR models).
Here are the key features and specifications based on the flash model:
Compatibility: The "SA-N" version is specifically for Sigma SA-mount cameras. It supports Sigma's TTL auto flash exposure control.
Guide Number (GN): Maximum GN is approximately 165 ft.2 (50 m) at the 105mm focal length (ISO 100).
Flash Coverage (Auto-Zoom): The flash head automatically adjusts to cover focal lengths from 28mm to 105mm.4 A built-in diffuser panel extends coverage to 17mm.
Advanced Features:
Allows checking light distribution and shadows before shooting.
Multi-Pulse (Strobe): Enables reduced power settings (down to 1/128) for multiple flashes in a single exposure.
High-Speed Sync (FP): Allows flash photography at faster shutter speeds (when supported by the camera).
Wireless TTL/Slave: Supports off-camera flash operation (capabilities may vary depending on the specific Sigma camera model).AF Assist Light: Helps the camera's autofocus in low-light conditions.
Power: Requires four AA batteries (alkaline, NiCd, or NiMH).16
