A camera for exposing latent images on successive frames of a filmstrip
having magnetic recording capacity, includes a control that actuates a
motor following exposure of each film frame to advance the filmstrip
forward one frame increment, and a magnetic head that magnetically records
user-selected information on the filmstrip adjacent the most-recently
exposed one of the film frames as the filmstrip is advanced forward. The
control first actuates the motor to advance the filmstrip rearward one
frame increment when it is desired to change the existing information
magnetically recorded adjacent the most-recently exposed one of the film
frames to some new information, and then actuates the motor to advance the
filmstrip forward one frame increment for the magnetic head to
magnetically record the new information adjacent the same frame in place
of the existing information.