Using With A Type-B Camera - Canon Speedlite 430EXIII-RT Instruction Manual

Using with a Type-B Camera

This section describes the available and unavailable functions when
using the Speedlite 430EX III-RT/430EX III with a Type-B camera (EOS
film camera supporting A-TTL/TTL autoflash).
Although <a> is displayed on the flash LCD panel when the
Speedlite is attached to a Type-B camera, autoflash is not
available. If you take a picture in this status, the flash will always fire at
full output.
Functions available with Type-B cameras
Manual flash
Second-curtain sync
Functions not available with Type-B cameras
E-TTL II/E-TTL/TTL autoflash
Speedlite flash exposure compensation
FE lock
High-speed sync
Quick flash
Modeling flash
Wireless flash shooting with radio transmission
Linked shooting
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