Abstract: Photographic apparatus for recording/reproducing information in a magnetic region along an edge of photographic film, the apparatus comprising:a magnetic head supported by said apparatus in contact with a magnetic region of film transported past the magnetic head, the magnetic head having a frustum shape in the direction of film transport with at least one magnetic gap at the center of the frustum, wherein the magnetic head-to-film interface is concentrated in those regions immediately surrounding the gap regions.

Abstract: A measuring and indicating device for a snow skier including a rotatable roller attachable to the rear of a ski and adapted to rotate in rolling contact with the underlying snow utilizes an indicator unit positionable remote of the roller such as upon the wrist of the skier. The device further includes elements supported adjacent the roller for sensing the rotation thereof and generating signals corresponding to the sensed rotation. The indicator unit includes a calculator for receiving the signals generated by the sensing elements and calculating a predetermined characteristic, such as speed or distance, of travel by the snow skier corresponding to the received signals. The indicator unit further includes a display for displaying the calculated characteristic in the form of a numerical value.