cmotion cPRO, cVision Focus Assist

cPRO is cmotion’s latest Lens Control System for focus, iris and zoom control.

cPRO hand unit

The cPRO hand unit is beautifully balanced, has an ergonomic design and intuitive controls. A thumb wheel below the touch screen display provides quick and easy access to the system’s extensive menu settings even while wearing gloves. The thumb wheel can also be assigned as a fully functional 4th axis controller.

The newly designed focus knob has a concave, finger-friendly shape, mechanical hard stops and an anti-slip grip. The cPRO’s illuminated marker ring, marker strip, user buttons and zoom position LED display provide clear information to the focus puller. Additional accessories include a cstrap mount for cmotion’s neck/ shoulder strap and a new monitor mount.

cPRO motors

The cPRO motor is mechanically similar to the cforce mini motor— but adds a built-in RF module and improved motor and motor gearing. By putting the wireless module into the motor, cmotion has eliminated the need for an extra motor driver unit being mounted on the camera. This reduces both weight and setup time.

Using the LBUS connectors, the system can be expanded with up to 2 additional cforce motors. The new CAM connector handles power supply, run/stop control and camera feedback for cameras including ARRI, RED, Sony, Canon, Blackmagic and Panavision.

cPRO camin

If you’re not using cPRO motors, the cPRO camin is cmotion’s smallest motor driver box. It has an LBUS connector to attach up to 3 additional cforce motors. It also has a CAM connector to connect to the camera. Using RED’s open protocol, cPRO offers wireless control over internal focus and iris scales on EF lenses.



cmotion cvision focus assist

The new cvision focus assist is a distance measurement tool that blankets the entire scene with hundreds of thousands of points per second. It can be used as a simple distance measurement tool or enhanced as a full auto focus system. The measurement system includes a stereoscopic measurement unit and a touch screen monitor on which a real-time depth map is generated as an overlay of the image.

The touch screen allows active focus tracking on any subject in the image. It also can show distance information for multiple subjects at the same time. The cvision measurement unit does not need to be aligned or adjusted to a subject. It measures continuously with a wide-angle field of view, working even before a subject comes into the shot.

cvision uses advanced stereo matching technology in a small housing. The system offers everything from basic distance output on a hand unit to advanced auto focus, which includes a tracking function for moving subjects and a point-to-track function by simply tracking the subject with your fingertips on the touch display. Two subjects can be tracked simultaneously with a controllable and predefined focus shift from one point to the other at the push of a button.

cmotion cinefade

The cmotion cinefade varies depth of field while maintaining correct exposure throughout the entire shot. This is done by pairing cinefade’s motorized variable ND filter with an iris motor on the lens. It maintains constant exposure over a range of up to 5 stops.

The in-camera effect is a change in sharpness of the background. It’s something like a rack focus of the iris. Picture a close-up on the hero actor, lens wide open at T1.4, the background very soft, the rotating filter at maximum ND. You engage the cinefade for a duration of 3 seconds. The iris closes down 5 stops (T8) and the ND filter wheel rotates to its clear position. Because we are now at T8, the background is now sharper—revealing Ninjas creeping up on the hero.

The cinefade filter is compatible with most ARRI matte boxes (LMB5/15/25, 4×5) and via LBUS. It works with most film and digital cameras and cine lenses. It’s small, lightweight and very easy to use.

Reprinted from Film and Digital Times September 2018 Edition #89-90

Leave a Comment

Tags: , ,