The ED-SEF220A External Flash from Samsung is designed to work on the hot shoe mount of the Samsung NX and EX series of cameras. The flash is compact, lightweight and provides automatic TTL exposure control. For its compact size this is a very powerful flash with a Guide Number of 16m (52.5') in the Wide Mode and 22m (72') in the Tele Mode, but the A-TTL allows for subtle low light flash and fill-flash photography as well.
Manual and Automatic TTL capabilities
Compatible with Samsung NX and EX cameras.
Guide Number of 16m (52.5') at ISO 100 for Wide Mode;
Guide Number of 22m (72') at ISO 100 for Tele Mode
52.5' (16 m) ISO100 at 20 mm position
GN: 16m (52.5') at ISO 100 in Wide Mode;
GN: 22m (72') at ISO 100 in Telephoto Mode