Yes all Canon brand speedlites will communicate all settings to the camera. It will also have the ability execute E-TTL (Auto mode for the flash). The camera’s metering system determines flash power. Then the speedlite will fire the correct amount of light that the camera told it to. Other features in the speedlite are High Speed Sync (HSS)/ FP Flash. Then 2nd/ rear curtain sync.
-Demetrius
Bodies: EOS 40D & EOS 5D Mark IV
Lenses: EF Holy Trinity, EF 50mm F/1.8 STM, EF 70-210mm F/4 & EF 85mm F/1.8 USM
Speedlites: 420EX, 470EX-AI, 550EX & 600EX II-RT
