The YS 90 AUTO does not do TTL
Actually, it does,...
The strobe features Auto 1 (single flash slave, hard wired trigger AUTO), Auto 2 (Auto for preflash cameras), and conventional TTL with compatible systems.
...but not with the Digital Rebel (except Aquatica A300ttl)
Ryan
Oh! I'm sorry. I meant with Canon cameras.
I'm Canon-centric, you know. 
Sorry about that...
