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The unique, rugged data recording camera is exceptionally clean in mechanical and electrical design for high reliability to meet exacting requirements for medium high-speed motion picture jobs today.

Unique features:

Variable shutter can be externally adjusted quickly and easily with no tools; no re-timing of camera required
Neon or LED timing lights can easily be replaced from outside the camera, without disturbing the film load.
Boresight provides positive and direct straight-through viewing. Because of quick-change magazine capability, boresighting can be accomplished in minimum time.
If usage dictates different film capacities, different film magazines are available rather than purchasing an entire new camera, resulting in considerable cost savings; 200', 400' or 1000' magazines interchange with no adjustment to camera or magazine.
Each magazine has a spring-loaded viewing port for viewing film loops.
Magazines are near-automatic with no climbing loop.
Because the magazines can only be properly threaded one way, timing mark offset is always 7 ?frames.
Film magazines can be interchanged in less than 5 seconds and camera/magazines drive interface is automatically aligned.
All film magazines thread identically and film is always positively locked by either the two register pins or the four pulldown pins.
Phase lock synchronization plug-in module option.
Remote speed control option.
Plug-in AC or DC power amplifier has unique reverse polarity protection including audible alarm to warn operator.

Camera Body includes a 115V motor (28V DC motor available at no additional cost), shutter, top, bottom, and side mounting position, continuously variable speeds from 10 to 200 fps, runout switch, 115AV thermostatically controlled heaters for -65 F, special Photo-Sonics interrupted thread bayonet lens mount with dust cover, camera dust cover, dual neon timing lights(LED's optional at additional cost), manual advance knob, press-to-operate switch, connector, oil and users manual. Out-of-film indicator standard.

The Shutter Correlation Pulse Assembly supplies an electrical pulse at the midpoint of the shutter opening. This pulse provides the synchronizing drive to the optional Film Data Recording System.

The Half Frame Conversion Kit offers the means of obtaining speeds of up to 6500 frames per second by changing the prism, shutter and aperture assemblies. (Not available in Models 4BL & 4CL.)

The Ballistic Synchro Kit can be used for obtaining detailed photographs of high-velocity missiles. The prism and rotary disc shutter are removed and a narrow stationary slit aperture is installed near the film plane. As the image moves across the film plane, the film velocity is synchronized with the image velocity. (Not available in Models 4BL & 4CL.)

Rotary Disc Shutters are available to provide 9, 18, 36, 72 and 90 degree openings.

Carrying Cases are heavy duty design covered plywood with 90 degree angle strips and internally blocked to provide snug fit for equipment.

The Control Box configuration depends on customer requirements. Options include and on/off toggle switch, remote connector for remote operation, power input connector, camera connector, and power indicator.

The modular electronics are solid state and the motor speed control is pulse width modulated. This type of system is inherently less sensitive to voltage and temperature variations, providing greater accuracy and stability than found in comparable analog systems. A unique protection circuit prevents damage to the electronics in the event of a mechanical failure. An acceleration control circuit provides smooth starting. A remote start capability requires only 25 ma from a 28 volt source, eliminating the need for switching main camera power. A press-to-operate switch is located at the back of the camera; this allows check-out of the camera by the operator without triggering circuits being actuated. The servo control is on one plug-in printed circuit board held in place by captive thumb screws. This board is completely interchangeable between cameras with no re-calibration adjustments necessary. The complete electronics, including harness, can be removed from the camera without the use of a soldering iron. All cameras are wired to accept the synchronization phase lock module, remote speed selector module and shutter correlation pulse module.

Automatic Exposure Control

The 35mm-4ML accepts the field-proven Apex-B "bolt-on" automatic exposure control system manufactured by Photo-Sonics. Many accessories are available to meet most requirements. A separate data sheet covers the Apex-B.

The real uniqueness of the 35mm-4ML lies in the magazine loading concept. The movement is built-in and provides positive film control through the use of dual registration pins and/or four pulldown pins at all times. The film may be threaded in less than 5 seconds. There are no film guides or shoes, sprocket guards or levers to release or move in order to load the film. Even the climbing loop is gone. It is the closest thing to automatic threading - yet, still gives the operator complete control at all times. All magazines are gear driven and do not require and take-up motors. A sliding door is provided in the magazine door to allow viewing of the film transport and film without disturbing the camera set-up.

200'- darkroom loading, daylight threading; weight w/film, 7lbs.

400'- darkroom loading, daylight threading; weight w/film, 11lbs.

1000'- darkroom loading of one of two interchangeable film spools, daylight threading; weight w/film, 20lbs.

This module can be added to the slide of the camera without any factory modification. It increases the overall camera width approximately ?quot;. The camera must be equipped with a shutter correlation pulse module which can also be easily installed in the field. The module provides several options in controlling one or more cameras. It can be used for phasing the shutter from an eternal pulse to and event which simultaneously makes the camera run synchronous to the input camera. The shutter correlation pulse in a camera can be used as a input pulse to other 35-4ML cameras equipped with this module which will make them run synchronous to the master camera. A built-in dual sensor in the camera simultaneously permits synchronization and out-of-phase modes between two cameras. For example, two cameras running at the same speed can also be operated 180 degree out-of-phase with each other. When three cameras with 140 degree shutters are phased 120 degree from each other… an event can be recorded continuously, 100% of the time.

Remote Speed Control

An optional remote speed control is available, using the same module as the phase lock electronics. This provides the additional capability of changing the frame rate, from any location, to any speed between 15fps and 200fps, up to 500' away proper interface

Frame rate: 10 to 200 fps by transistorized variable speed control.
Accuracy: +/- 1% or +/- 1 frame, whichever is greater.
Aperture size: 0.745" X 0.995"
Film specification: Standard- USA PH22.36 (KS.1870" pitch)
USA PH22.139 (KS.1866" pitch)
Optional- USA PH22.93 (BH.1866" pitch)
USA PH22.34 (BH.1870" pitch)
Film capacity: Camera accepts both .004 and .006 inch film. Camera and magazine will accept short or long pitch without modification.
200 ft. magazine;
400 ft. magazine (horizontal and vertical);
1000 ft. magazine (Coaxial).
Film transport:
Shutter:

Timing lights:
Motor:
ntermittent, two registration pins and four pull-down pins with film held captive in aperture gate at all times.
Variable rotary disc with openings of 9, 18, 36, 72, and 144 degrees. (Fixed shutters for phased lock optional)
Two LED's, one each side of film outside picture area.
115V AC, 50/400 Hz, 4 amps max. at 200fps; 28V DC, 18 amps max. motor available upon request at no additional coat at time of order.
Weight:

Mounting:
Lens mount:
Heater:
9 ?lb. (camera body only)
Top, bottom, and right side of camera. If phase lock is used only top and bottom mounting are available.
Special bayonet Photo-Sonics interrupted thread. (Nikkor mount optional at extra cost)
115V AC or DC, 300 watts, thermostatically controlled.

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