Pentax MX - Pentax MX Film Unloading Procedure

UNLOADING FILM
After the final picture on the roll has been taken, the rapid-wind lever
will not advance further, indicating that the film must be rewound.
Lift up the rewind crank. Depress the film rewind button and turn
the rewind crank as indicated to rewind the film into its cartridge.
Rewind until the tension on the crank lessens, indicating that the
leader end of the film has been released from the take-up spool. Pull
out the film rewind knob (the back will open automatically), and
remove the film cartridge.
AVOID DIRECT LIGHT WHEN UNLOADING THE FILM.