0x8022 = 3
Thanks again nafraf.
This ID works fine. It sets the camera to distant subjects focus range (the mountains icon is correctly displayed), but the ixus 125 keeps focusing despite of it, and, if nothing detected, farer subjects are blurred.
I'm looking for for a "set_fous=65535" equivalent. The CHDK SD override doesn't work on ixus 125.
Sorry for misunderstanding due to my bad English.