Canon 814XL - Manual (Page 45)

Changing a Half-used Cartridge
Since Super 8 film comes in a cartridge, you can
change to different types of film before one car­
tridge is totally finished. Footage wasted by
changing cartridges is only about 6 frames in­
cluding that part exposed to the light and a few
frames before and after.
« Before changing half-used film, please ad­
vance it slightly so that light will not fog any ex­
posed portion.
* Upon changing film cartridges, the footage
counter will automatically return to 'O'. Thus, it is
best to write down the amount of exposed
footage on the removed cartridge.
« Since the film end warning indicator is
coupled to the footage counter, if you insert a
half-used cartridge, the lamp will not light. You
can tell that the film has ended by looking at
either the footage counter or the film transport
indicator.