What Is My Camera’s Firmware
To find the firmware version, put the SD card in a computer somewhere and do this:
$ touch /mnt/cameraSD/ver.req
Basically you need an empty file called
ver.req in the top level of
the SD card. Put the camera back in and turn on in playback. Hold
DISP (in that order). My camera says the following.
Canon PowerShot A590 IS P-ID:3176 NT D Firmware Ver GM1.01B No Error Jan 24 2008 20:41:51