Greetings,

Am having problems with the Rebel XT and the 70-300 lens.

Camera setting for Auto Focus is on AI Focus and when I push the shutter--it either won't register contact and work at all--or there is a significant lag of time before working.

Have tried the old faithful--take out battery--switch Focus Settings--turn off and on--switch to MF on the lens...

Any other ideas?

Thanks much,

DrMarm