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A PARALLEL OF 16 AND 35 MM. FILMS
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zines are loaded beforehand in dark room. Cameras are threaded in daylight) .
Spring driven hand cameras are nearly all of 100 ft. capacity, not including leaders at each end of roll to permit daylight loading and unloading.
Theatre projectors have a capacity of 2000 ft.
Portable projectors a capacity of 1000 ft.
each end of roll to permit loading and unloading in daylight) .
Standard capacity 400 ft. corresponding to 1000 ft. of 35 millimeter film.
Some 16 millimeter projectors are equipped for reels of 400 ft. capacity equalling 5000 ft. of 35 millimeter film.
Running Time
35 Millimeter
1000 ft. magazine of film, at 1 6 pictures per second camera speed, lasts about 16 minutes (one foot of film per second) . Camera is usually motor driven, but can be cranked by hand.
100 ft. spring cameras usually run about 55 ft. at winding. If equipped with hand crank, the whole 100 ft. roll can be run off without stopping. Time iy2 minutes. Sound pictures are taken at a speed of 24 pictures per second.
16 Millimeter
100 ft. roll of 16 millimeter lasts 2J^ times at long as 100 ft. of 35 millimeter film. Most 16 millimeter cameras run about 25 ft. at winding. Time about 1J4 minutes.
If equipped with hand crank, the entire roll can be run off without stopping. Time about 4J4 minutes.
The speed of the best camera equipment can be automatically regulated from approximately half below to considerably above normal.
Lighting
35 Millimeter
The professional and especially the studio cinematographers use artificial lighting for modeling the subject.
A good amount of lighting equipment is used and controlled through distance from the subject and proper diffusing of each source of light for obtaining the desired effects created by the artistic conception of the cinematographer.
In outdoor cinematography the lighting is generally controlled through the use of reflectors.
16 Millimeter 16 millimeter film users are usually limited in the number of lights they may use through considerations of economy and current available.
The placing and diffusing of the lights available is dictated solely by the users' artistic conception and knowledge of film speed.
The newest supersensitive films should prove very valuable to 16 millimeter cinematographers, as they offer greater latitude in lighting control.