Handbook for motion picture and stereopticon operators . 0 J 160 180 200 Extra wide angle — Wide angle *4 size Vs size ^2 size 10131/2 10 13^3 10 12V2 10 w2 14 16103/2 12 133/2 15 The following table gives the various sizes ofpictures to be had with different objectives, usinga picture 3 inches in height: Size of lens. Distance in feet from objective to screen. 10 20 30 40 60 60 70 80 90 100 110 Wide angle 6 12 9 181512 191712 191512 181512 201815 20 18 22 20 22 ?4 Operators Handbook 75 Trunks. For many reasons trunks and heavy leather casesare the best carrying devices for motion-pictureappar
Handbook for motion picture and stereopticon operators . 0 J 160 180 200 Extra wide angle — Wide angle *4 size Vs size ^2 size 10131/2 10 13^3 10 12V2 10 w2 14 16103/2 12 133/2 15 The following table gives the various sizes ofpictures to be had with different objectives, usinga picture 3 inches in height: Size of lens. Distance in feet from objective to screen. 10 20 30 40 60 60 70 80 90 100 110 Wide angle 6 12 9 181512 191712 191512 181512 201815 20 18 22 20 22 ?4 Operators Handbook 75 Trunks. For many reasons trunks and heavy leather casesare the best carrying devices for motion-pictureapparatus. Stout, that is, extra well-made trunks,are by far the cheapest in the long run. It is al-most beyond belief, certainly to the layman, howsoon a piece of apparatus is broken in even the besttrunks. Smaller trunks and several of them isbetter than fewer large trunks. Total charges area little more, but the trunks and apparatus lastmuch longer. The transfer and baggage menhandle them easier and dont drop them so far orso heavily. 76 Motion Picture. Operators Handbook 77 THE OPERATORS RESPONSIBILITY. Every moving-picture machine operator, andthose who are responsible for his employment,should appreciate the vitally responsible positionthe operator occupies. Not only is he engaged ina business where carelessness may result in greatmonetary loss, but he has in his hands the lives ofhis audience; as much so as the engineer of atrain. Carelessness is criminal, and the operatorwho holds down the shutter with a brick, and runsthe machine with a motor, while he sits by smok-ing cigarettes and reading a novel should have hislicense instantly revoked and be held liable forcriminal negligence. The operators first duty isto so conduct himself as to invite confidence andkeep his audience passive. A little excitementmay, at any moment, start a panic which mightcause great loss of life. The business is young and experienced operatorsscarce, it is admitted, but this should only makeemploy
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