Length:  14" less lens (21.5" w/ typical zoom lens)

Height:  13.5" (from lowest point on motor to handle)

Weight:  20.5 lbs (w/ zoom lens & film)

Shutter:  180 degrees fixed or adjustable 5 to 180 degrees in 5 degree increments

Exposure Time:  1/48th of a second at 24fps (180 degree shutter)

Filming Speeds:  4fps - 48fps max. (depending on motor used)

Battery Voltage Requirements:  10.8 - 13.5v DC (12 v DC nominal)

Current Requirements:  2 amps @ 25 degrees C

Lens Mount:  (1) CA-1 bayonette type and (1) "C" threaded type

Flange Focal Distance: CA-1 mount = 1.8897"; C mount = .690"

Typical Noise Level:  29.5 dbs at 36"

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Movement
Film is advanced by a desmodrimic cam movement. Quiet film movement is achieved by a wedge-shaped claw which slides into the film perforation with a wedging motion. Film is pulled down and registered upon a bench-type registration pin which begins moving into position before the film has stopped. Extra long rear pressure plates and side guide rails steady the film. The raised area in the center of the aperture portion of the pressure plate eliminates the possibility of film breathing or focal shift.

Shutter
A 180 degree high-reflectance front-surfaced mirror shutter, centered on the motor shaft below the aperture and rotating at a 45 degree angle between the lens and the film plane. The shutter rotation delivers a horizontal exposure action very close to the aperture. Since it cuts the aperture horizontally, it reduces to a minimum the stroboscopic or "skipping" effect often seen when shooting fast moving objects.

Lens Mounts
A two-position turret has one Camerette CA-1 lens mount and one standard "C" mount. The CA-1 is a heavy-duty precisely constructed instant change bayonet-type mount. All major lens manufacturers are supplying lenses in the CA-1 mount and adaptors are available to go from the Arri-Standard and Arri-Bayonet to the CA-1 flange.

Motor Drive
The camera motor operates at 1440rpm (for 24fps) to drive the shutter shaft directly via a rubber coupling. This approach contributes to the exceptionally low noise of the camera since there are no gears or belts involved. The high starting torque allows the motor to reach sync speed almost immediately. The motor is mounted to the camera through a rubber isolation pad and can be removed or installed in a matter of minutes.

Focusing
The NPR offers parallax-free through the lens focusing and viewing. The image is magnified 12 times. Critical focusing is possible even at low light levels or with the lens stopped down because of the extremely fine grain ground glass, high-gain mirror shutter and low loss optical system. The swiveling viewfinder has extreme brillance and shows an area far in excess of the actual film aperture: 60% more on each side and 20% more on the top and bottom. There is an inner rectangle that outlines the full aperture. Positioning the ground glass at the aperture where it cannot shift contributes to the brillance and accuracy. Using this technique, any inaccuracies in alignment of the viewfinder will not affect the accuracy of the ground glass positioning. The eyepiece adjusts for either left or right eye operation and has at least a full +-5 diopters of compensation.

Magazines
The NPR accepts 400' coaxial-type magazines that use a pre-threaded loop and may be snapped on and off the camera almost instantly. The entire film aperture and film channel may be inspected and cleaned when the magazine is removed. No torque motors are required for take-up. Each magazine takes either core loads or daylight spools of 100', 200' or 400' capacity. Separate footage counters are provided for core and daylight spool loads. As soon as the core load is engaged in the sprocket wheel of the magazine feed chamber the remainder of the threading operation may be carried out in daylight. The magazine has noise making clutches and loop guards to disengage the drive and warn of a threading malfunction.

Other Features
A built-in automatic clapper light for producing visual slate marks is provided along with a corresponding 8v DC current to activate an internal bloop tone oscillator in any suitably equipped sync sound recorder (e.g. Nagra).