Motorizing your ZEISS LWZ.3 zoom lens with Chrosziel CDM-LWZ3-Z

The CDM-LWZ3-Z is designed for the Zeiss Lightweight Zoom LWZ 21-100 mm/T2.9-3.9 T zoom lens (ZEISS LWZ.3). With the Zoom Servo Drive Chrosziel addresses camera operators working in the broadcast, documentary, and related sectors offering a reasonably priced device enabling creative processes that may be impossible while pulling zoom manually.

The Zoom Servo Drive adds only indispensable weight to the setup. It contains one digital servo motor, the gear and a PCB with CPU in one single housing. The mounting of the Zoom Servo Drive makes the operator’s workflow comfortable. Just three captive screws are needed to mount it onto the Zeiss Lightweight Zoom (LWZ.3).

Until today, zoom servo drives were operated either by the inbuilt zoom rocker or external zoom devices. A second handgrip controls the camera settings or user commands. Both units are separated from each other and cannot be operated by one single hand.

With the CDM-LWZ3-Z Chrosziel was able to unify both functionalities into one single unit. Supported are the smart grips of the Sony PXW-FS5 and Sony PXW-FS7 or any LANC compatible zoom rocker.

For operation the power cable is connected and the two Jack cables with the handgrip and the camera. Once powered the zoom servo drive calibrates automatically the end stops of the lens. To further support the operator’s piece of mind Chrosziel implemented the so called “Soft Ramping”. Instead of having the zooming suddenly and unexpectedly stop, the zoom gently slows down the movement of the lens at the end stops.

By using a LANC device the operator may build his or her setup, like shoulder, Steadicam or Gimbal applications. Thus, the CDM-LWZ3-Z makes an all-day companion for the Zeiss  Lightweight Zoom LWZ.3 21-100 mm/T2.9-3.9 T zoom lens (ZEISS LWZ.3) and gives the camera operator the freedom of creativity needed.

Control commands (e.g. menu / user buttons / focus magnification / camera run & stop) are immediately looped through to the camera via the LANC protocol.

By using a Sony PXW-FS5 or a Sony PXW-FS7 camera with a SWIT battery a D-Tap to a (straight or angled) Lemo compatible 5-Pin power cable is used (Chrosziel order numbers: MN-AB-A with angled Lemo compatible socket / MN-AB with straight Lemo compatible socket). The two Jack-Jack cables are forwarding the control commands from the hand grip.

If e.g. a Panasonic Varicam, Sony PMW-F5 or Sony PMW-F55 are used a combined cable with power and start / stop is required, like a Hirose 4-Pin to a (straight or angled) Lemo compatible 5-Pin cable (Chrosziel order numbers: F55-A2-PCAM-A with angled Lemo socket / F55-A2-PCAM with straight Lemo compatible socket). Also, the two Jack-Jack cables are forwarding the control commands from the hand grip.

Also, Chrosziel offers a variety of power cables with straight and angled plugs for all types of camera power out sockets and batteries including camera run / stop functionality.

For freedom of creativity the operator may choose from four different zoom modes: EB / Documentary Mode, Live / Hardcut Mode, Silent, and Direct Mode.

EB / Documentary Mode

Designed for long and smooth zoom drives with the CDM-LWZ3-Z it offers slow creeping zoom transitions while keeping the motive perfectly framed.

Silent Mode

To reduce the sound of the zoom servo drive the maximum speed of its motor is limited to 40 percent making the setup almost inaudible.

Live / Hardcut Mode

To catch the best moments, the Live / Hardcut Mode is useful. It uses 80 percent of the maximum speed capacity of the motor offering fast zoom drives but with Soft Ramping.

Direct Mode

The Direct Mode finally uses the full speed capacity of the Zoom Servo Drive. The LANC commands are implemented instantaneously without ramping and smooth transitions. Useful for B camera operators catching snaps shots from the concert.