A New Camera Timer for Time-Lapse Cinematography
Henry Roger · Journal of the Society of Motion Picture Engineers · 1939
Uy "time-lapse" or "stopniotion" cineinatography we m ~a n motion picturcs o f coiiiparativcly slow actions that appear to be spccdcd up when projcrtctl upon the scrrcii.We may presume that film records of actions takrti at any lower frccluency than normal projection speed would bclony to this category hcausc they arc more or less spccded up when projccted.For practical reas~iis we limy say, howcvcr, that useful time-lapsc work rangcs bctwccii one frainc per second and one frame pcr hour.Historically spraking t hc iisc of 1 inic-lapse cinciiiatography iiiay be tracer1 back to tlic early days of thc motion pirttire art.I t has hccn cinploycd cxtensivcly i i i the natural sciciicrs to denionstrate, for exariiplc, the proccss o f plant growl 11, the opcning of flowers, slow chcniical rcactions, elc.The taking o f motion pictures of this type is, of course, very simplc, aside from