Canon EOS Rebel XS Instruction Manual page 81

External Speed[[tes _z_
EOS-ded}¢ated, EX=series SpeedHtes
Basicat[y operates Hke a built-in flash for easy operation.
When an EX-series Speed}ite is attached to the camera, almost all the
autoflasb controt is done by the camera in other words, it is like a high-
output flash attached externally in place of the built-in flash.
For detailed instructions, see the EX-series Speedlite's instruction
manual This camera is a Type-A camera that can use all the features of
EX-series Speediites.
Shoe-mount Speedlites Macro Lites
Only [Flash exp, comp] and [E=TTL ll] can be settable for flash function
settir_gs(p.ff 7) with an EX-series Speedlite not controffable bythe camerak
(For some EX-_eries SpeedJites,[Shutter sync.] can also be settable.)
t66