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CINEMATOGRAPHIC ANNUAL,
Lenses
35 Millimeter
A 2" lens is used as standard for 35-mm work. Usually is oi F 2 or F 2.5 speed.
Great care has to be exercised in focusing fast lenses when used on 35 millimeter cameras.
Only lenses of the highest quality of both design and construction should be used for both 35 and 16 millimeter cinematography.
Great care is exercised in mounting lenses so as to insure perfect alignment and setting.
16 Millimeter
A 1" lens gives the same perspective on 16 millimeter film as the 2" lens does with the 35 millimeter size. F 3.5 is the usual maximum speed for exterior work.
Lenses used for 16 millimeter work have greater depth of field, (often called depth of focus) than those used for 35 millimeter work. Therefore, they do not have to be stopped down as far to get the same results. Lens apertures of F 1.8, F 1.5 and even F 0.99 are used on 16 millimeter cameras.
Special Camera and Photographic Effects
35 Millimeter 35 millimeter cameras are to be preferred where elaborate or special effects are desired.
35 Millimeter
Ultra-speed attachments are available for professional cameras, permitting 1000 ft. runs at speed of from 128 pictures per second up to about 250.
Cameras operating at higher speeds are used only within the research laboratory.
Color 35 Millimeter
Special mechanisms and films are available for taking both color and black and white pictures with the same camera.
These use the bi-pack process such as Multicolor.
The Technicolor process requires special cameras.
A certain skill is required for taking color 35 millimeter films.
16 Millimeter 1 6 millimeter cameras and accessories are now available, that almost any professional effect can be reproduced, though not quite as easily.
Slow Motion
16 Millimeter
Combination cameras with variable speeds (from 16 to 64) are available. Run about 15 seconds at 64 speed.
A special 16 millimeter slow motion camera is available, running at 6 seconds at 128 (normal slow motion) speed.
16 Millimeter
Attempts are being made to make 16 millimeter reduced prints from 35 millimeter bipack negatives. Nothing is commercially available at the time of writing.
The Kodacolor process is exclusive to 16 millimeter film, and is the only three-color process available for general use, not requiring particular skill.
The color rendition of this process is the best available.