Sorry meant to say can you change the lengh of the timer? Currently at 10seconds
Yes, if you have mirror lock-up enabled (Its in the custom functions menu) the self timer will be 2s.
I'm not 100% sure but i think so , do you have the camera manual.
PDF copy here.
http://gdlp01.c-wss.com/gds/0900000357/EOSDRXTi400DIM-EN.pdf
No difference ,rebel xti is what they call it in the USA, same camera.
Iam trying to achive this shot...set it all out but once I try to fire a shot off the lens isnt working correctly...it seems to focus ok but doesnt take a shot
Ive tried various places, still not having any joy.
I've had a 400d before and I think 2 and 10 are the only options i am afraid... maybe try a remote trigger?