The SIGMA DP3 Merrill features a "9 point select mode" which can select the desires focusing point from 9 different frames and "Free move mode" which can move the desired point as you like.
But, starting in the nineteen-thirties, music soundtracks were added to silents, and the films needed to move through the projector at twenty-four frames a second, so that the optical sound reader could handle the music track.
It is the biggest seller of pens and markers in the world and the top seller of picture frames, but it has made scant effort to squeeze suppliers or move production to Asia or Mexico to lower costs.