ARRI WRC-2 instruction manual Ramp Control Menu Ramp Example

Ramp Control Menu

14.7 Ramp Example

Even though the WRC-2 can compute the correct exposure values, a proper planning of the ramp is recommended to understand and follow the calculations. For this example we assume the following:

-The director wants to change the camera speed between 3 and 24 fps manually.

-The exposure should be compensated by iris and shutter simultaneously.

-Set up the WRC-2 and acquire the correct f-stop.

The WRC-2 could be set up as follows:

1.) In the Main Menu click on „Lens Manger“. Make sure that the used lens is loaded and calibrated (see Chapter 15) otherwise the iris compensation will not be available.

2.) Start the Ramp Control Menu (from Main Menu).

3.) Click on „Options“ and enable the Ramp and Exposure Meter Controls. Measure the light to acquire the working f-stop and enter the value in the yellow window. Make sure your lightmeter is set to 1/50 second or 24/25fps. Click EXIT to confirm.

4.) Click on „Speed“ and enter the start value „3“ and the end value „24“ frames per second.

5.) Select „Knob“ from the Ramp Time Window to enable the manual speed change.

6.) Activate „Shutter“ and „Iris“ compensation and move the slider in the middle position to mix the compensation ratio to 50% Iris and 50% Shutter. Use the Arrow Buttons to adjust in small steps.

7.) Confirm the working f-stop or enter a new one if the light has changed.

8.) Start the camera by pressing the RUN button and control the speed change by turning the knob.

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