SA-STTL Sigma
ELECTRONIC FLASH EF-610 DG ST
It is possible to use TTL Auto,Manual Flash, Autozoom Head, AF Auxiliary Lamp. Manual flash mode with two levels: Full power and 1/16 power. Auto Power-Off function shuts off 300sec. after use.

EO-ETTL II Canon
ELECTRONIC FLASH EF-610 DG ST
Operation of TTL Auto system varies by Camera Model (If E-TTL II, E-TTL and TTL Automatic Exposure can be used then A-TTL Automatic exposure is not possible). Manual Flash, Autozoom Head, AF Auxiliary Lamp can be used with almost all camera models. Manual flash mode with two levels: Full power and 1/16 power. Auto Power-Off function shuts off 90sec. after use.

NA-iTTL Nikon
ELECTRONIC FLASH EF-610 DG ST
It is compatible with new i-TTL system. TTL Auto varies depending on the lenses in use, but it works on all cameras. It is possible to use Manual Flash as well. Available with cameras providing Red-eye reduction control only. Manual flash mode with two levels: Full power and 1/16 power. Auto Power-Off function shuts off 80sec. after use.

*1: Flash Exposure function changes by the lens, and metering mode. For details, please refer to instruction manual of your camera.
*2: It can be used, if center focus is selected.

SO-ADI SONY
ELECTRONIC FLASH EF-610 DG ST
It is possible to use TTL Auto, Manual Flash, Autozoom Head, AF Auxiliary Lamp. High-Speed Synchro cannot be used with some camera models. For details please refer to compatibility table. Manual flash mode with two levels: Full power and 1/16 power. Auto Power-Off function shuts off 240sec. after use.

PA-PTTL Pentax
ELECTRONIC FLASH EF-610 DG ST
TTL Auto, Manual Flash, Autozoom Head, AF Auxiliary Lamp can be used with all AF models. Red-Eye Reduction cannot be used with some camera models. Manual flash mode with two levels: Full power and 1/16 power. Auto Power-Off function shuts off 180sec. after use.