Controllable slave groups: 3 (A, B and C)
Flash ratio control: 1:8 - 1:1 - 8:1 in 1/2-stop incremments
Slave-ready indicator: AF-asssist beam blinks
Modeling flash: Fired with camera's depth-of-field preview button
AF-Assist Beam:
Linkable AF Points: 1-45 AF points (28mm or longer focal length);
At center: 0.6-10m / 2.0-32.9 ft;
Periphery: 0.6-5m / 2.0-16.4 ft.
Package Included:
1 x flash bag
1 x MK600 Flash
1 x English and Chinese manual