Solutions to Errors & Issues
"scanimage: sane_read: Operation was cancelled" when trying to scan negatives
The use of the transparency unit in Canon CanoScan Scanner requires to take the regular white background away from the covering lid, beneath with the actual backlight of the transparency unit resides.
Any scanning attempt with the transparency unit as source while the backlight is hidden by the white background yields the error described above – which is, sadly, not very descriptive.
After taking way the background the transparency unit should at that point work.
Basic End User Documentation
Setting up your Canon Scanner and a demonstration on scanning film on GNU/Linux
Useful Documentation For More Advanced users