2The Canon Speedlite 430EX III-RT/430EX III is an EOS-dedicatedexternal Speedlite, compatible with E-TTL II/E-TTL autoflash systems.The Speedlite can be used as an on-camera flash that attaches to thehot shoe of the camera (normal shooting), as a master unit or slave unit(430EX III-RT only) during radio transmission wireless flash shooting,and as a slave unit (430EX III-RT/430EX III) during optical transmissionwireless flash shooting.Before Starting to Shoot, Be Sure to Read the FollowingTo avoid botched pictures and accidents, first read the “SafetyPrecautions” (pages 8-9).Read This Instruction Manual While Also Referring to YourCamera’s Instruction ManualBefore using the product, read this instruction manual and yourcamera’s instruction manual to familiarize yourself with their operations.Using with an EOS DIGITAL camera (Type-A camera)You can use the Speedlite for easy flash shooting by autoflashcontrol in the same way as a camera’s built-in flash.Using with an EOS film cameraAn EOS camera with E-TTL II/E-TTL autoflash meteringsystem (Type-A camera)You can use the Speedlite for easy flash shooting by autoflashcontrol in the same way as a camera’s built-in flash.An EOS camera with TTL autoflash metering system (Type-Bcamera)See page 102.* This instruction manual assumes that the Speedlite is used with aType-A camera.IntroductionWireless Flash Shooting 430EX III-RT 430EX IIIRadio transmissionwireless functionMaster k –Slave k –Optical transmissionwireless functionMaster – –Slave k kUsing the Speedlite with a Camera
