To enable flash photography, set [To enable only the AF- assist beam to be emitted, set [Disable ... Wireless functions ... Wireless (multiple) flash shooting is possible with radio or optical transmission. For details on wireless flash, refer to the Speedlite’s instruction manual.
Adjusting Settings In viewfinder shooting, you can adjust drive mode, built-in flash firing, and Creative Assist ... In Live View shooting, you can adjust built-in flash firing, drive mode, image quality, Touch Shutter, and Creative Assist ...
contrast detection Phase-difference detection EOS-1Ds Mark III No TTL-AREA-SIR with a CMOS sensor 19 AF points (cross-type) and 26 Assist AF points (total 45 points) - - EOS-1Ds Mark II No TTL-AREA-SIR with a CMOS sensor 45 AF points (Area AF) - - EOS-1Ds No TTL-AREA