Canon TL Instructions Manual page 26

5
Bring down the QL cover to hold the film in place by
closing the back cover. Look through the sprocket
window to see if the film is correctly engaged on the
sprocket.
6
Press down on the back cover to prevent it from
rising, and turn the back cover lock clockwise .
• If the film is sagging, the cartridge will rise and the
back cover will not close.
7
Leave the lens cap on and make three blank shots,
each time turning the film advance lever. The frame
counter will advance from the " S" mark to "0" . With
one more advance, the camera will be ready for the first
shot.
26