Canon MT-26EX-RT Macro Twin Lite - Manual (Page 121)

121
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.
Using with a Type-B Camera