Quote Originally Posted by trosky
but i have AF on AI servo

In AI-Servo, there is no focus confirmation (no beep, no green dot in the viewfinder). If that's why you think it wasn't 'finding focus' you're right - it's not supposed to (well, it is focusing, but it's not confirming that for you). AI-Servo is for tracking moving objects - running sports players, flying birds, etc. If you're shooting a person posing for a photograph, you should be in One Shot (or at least AI-Focus, which starts out as One Shot then automatically switches to AI-Servo if the subject moves).


I'd suggest that you get yourself a guide book to the T1i - and read it!