Using With A Type-B Camera - Canon Macro Twin Light MT-26EX-RT Instruction Manual

Using with a Type-B Camera

Available functions when using the Macro Twin Lite MT-26EX-RT with a
Type-B camera (EOS film camera supporting TTL autoflash) are
manual flash (p.45) and second-curtain sync (p.44) only. Other
functions are not available.
When the MT-26EX-RT is attached to a Type-B camera, <a> is
displayed on the LCD panel of the flash. However, autoflash
metering cannot be performed.
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