2C Crystal Motor Base

The Cinematography Electronics 2C CRYSTAL MOTOR BASE is a custom high-torque motor with many features that expand the capabilities of Arri 2C type cameras. The 2C CRYSTAL MOTOR BASE has over 80 built-in crystal speeds, and stops the camera with the mirror shutter in the viewing position. Our motor base drives the camera forward or reverse at all speeds, and makes filming with HMI lights and time lapse photography possible. With the 2C CRYSTAL MOTOR BASE's ergometric shape mounted under the camera, hand held filming becomes simple. For studio tripod setups, the motor base mounts to standard camera balance plates. The 2C CRYSTAL MOTOR BASE is compatible with Arri 2C, 2B, 2A, and 3C cameras and many popular accessories.

2C Crystal Motor Base

2C Crystal Motor Base

The crystal speed range of the 2C CRYSTAL MOTOR BASE is 1 through 80 frames per second (fps) in 1 fps increments. The crystal speeds are selected with two push-button digit switches that are protected by a sliding door. Crystal speeds of 33.333 fps and 16.666 fps are also provided for flickerfree filming with 50 Hz HMI lights. The motor base runs forward or reverse at all speeds; the direction of filming is determined by the FWD/REV switch located on the right side. An out-of-sync beeper with adjustable volume chirps when the camera is not running at the selected speed.

In addition to driving the camera at 1 fps continuously, the 2C CRYSTAL MOTOR BASE makes your camera an excellent choice for single frame time-lapse photography. To activate this single frame feature, connect a Cinematography Electronics Intervalometer or Single Frame Push-Button Cable into one of the accessory connectors on the motor base. In this mode, the exposure time for each film frame is 1/3 of a second.

Located on the camera assistant's side of the motor base are a digital LED tachometer and footage/meter counter. The tachometer displays the running speed of the camera or the selected (preview) speed when the camera is off. The footage/meter counter, with reset and a four-hour memory backup, displays the total film count. The 2C CRYSTAL MOTOR BASE is powered by one or two 12 volt DC batteries, and has two battery indicator LEDs that show the voltage condition of each battery. A resettable circuit breaker protects the entire motor base.

The 2C CRYSTAL MOTOR BASE stops the camera with the mirror shutter in the viewing position. In addition, the motor base has two camera run switches; a toggle switch on the assistant's side of the camera for tripod work, and a momentary push-button on the rear surface of the base for hand held filming.

The 2C CRYSTAL MOTOR BASE attaches to the bottom of the camera with two captive lockdown screws. A rubber coupling mates the motor base with the star-shaped drive gear on the camera. This coupling reduces noise and helps isolate the camera from motor vibration. Our comfortable configuration of the motor base under the camera makes hand held filming easy. The 2C CRYSTAL MOTOR BASE includes a built-in follow focus bracket for attaching Arri-type hand held lightweight support rods and matte boxes.

For filming with studio tripod setups, the 2C CRYSTAL MOTOR BASE provides mounting holes for attachment to standard balance plates and support rods (15 mm or 19 mm). This places the lens at the proper height for matte boxes and lens accessories.

For interfacing with other devices, the 2C CRYSTAL MOTOR BASE provides two Fischer 11 pin accessory connectors on the right side. The motor base is compatible with the Cinematography Electronics Precision Speed Control 2, Syncromark Laser System, Intervalometer, Remote Tach & Counter, and more.

Chosen by camera rental companies and custom camera manufacturers for its rugged design features, ease of use, and wide range of crystal speeds, the 2C CRYSTAL MOTOR BASE is the professional choice for your Arri 2C type camera.



Size: Inch: 5.8 x 6.2 x 1.9   mm:147 x 157 x 48
Weight: 60 oz (1.7 kg)
Construction: Machined Aluminum (Not Cast)
Finish: Black Anodize, Engraved
Crystal Speed Range: 1 to 80 fps in 1fps increments
Crystal Speed Select Switches: 2 Digit Push Button (With Protective Sliding Door)
Crystal Accuracy: 0.002%
Additional 50 Hz Speeds: 33.333 fps and 16.666 fps
50 Hz/60 Hz Speed Select Switch: Slide (Internal)
Reverse Running: All Speeds
Forward/Reverse Running Switch: Push Button (Screwdriver Accessible)
Out-of-Sync Beeper: All Crystal Speeds, Adjustable Volume
Camera Run Switches: Toggle
  Push Button, Momentary
Digital Tachometer: Bright Red LED (With Speed Preview)
Digital Footage/Meter Counter: Bright Red LED
Footage/Meter Select Switch: Slide (Internal)
Counter Reset Switch: Push Button, Momentary
Counter Memory: 4 Hours Minimum
Battery Indicators: Bright Red and Green LEDs
Battery Connectors: Switchcraft D4M 4 Pin (2)
Speed Acceleration Ramp: Linear, Automatic
Parking: Stops with Shutter in Viewing Position
Single Frame Exposure Time: 1/3 Second
DC Power Requirement 1-30fps: 12 volt
DC Power Requirement 1-80fps: 2 x 12 Volt
Circuit Protection: 7.5 Amp Circuit Breaker
Accessory Connectors: Fischer D104 11 Pin (2)
Camera Lockdown Screw: 3/8-16 & 5mm
Balance Plate Mounting: 3/8-16 Threaded Hole and Locating Hole

Camera Compatibility 

Arriflex 3C, 2C, 2B*, 2A*
  * Arriflex 2B and 2A cameras require an inexpensive star-shaped drive gear.

Filming Speeds 

Selectable, 60 HZ HMI Flickerfree Filming Speeds: 60, 40, 30, 24, 20, 15, 12, 10, 8, 6, 5, 4, 3, 2 & 1 fps
Selectable, 50 HZ HMI Flickerfree Filming Speeds: 50, 33.333, 25, 20, 16.666, 10, 5, 4, 2 & 1 fps