Canon BeBit (Japan) has posted an AF adjustment program for the PowerShot A10, A20, A30 and A40 digital cameras. This software is loaded onto the camera via a Compact Flash card and when run (in camera) adjusts and improves AF accuracy especially at the telephoto end of zoom.

Click here for the Canon PowerShot A10 AF adjustment program

Click here for the Canon PowerShot A20 AF adjustment program

Click here for the Canon PowerShot A30 AF adjustment program

Click here for the Canon PowerShot A40 AF adjustment program