To set the exposure on the Canon C70, first set...
- ISO to be 800 (native - best for dynamic range)
- Shutter angle to be 180 degrees (motion blur)
- F stop to match the desired DOF
Then adjust the ND filter to obtain the desire exposure.
False color is a tool to visually get an indication of exposure.
From the Canon manual.
| Colour | Description | IRE |
|---|---|---|
| Red | White Clipping | 99-100% |
| Yellow | Near White Clip | 97-99% |
| Pink | One stop over 18% Gray | 52-56% |
| Green | 18% Gray | 38-42% |
| Blue | Just above Black Clip | 2.5-4% |
| Purple | Black Clipping | 0-2.5% |
Dark grey to light grey is shown for exposures between these values.
To set good exposure for skin tones (target between 55 IRE to 70 IRE - we want the face to be Pink and Green - with no Blue (underexposed) or no Yellow (over exposed).
Image courtesy: Time in Pixels website
Using Zebras
Another method is using a Zebra at 50%IRE +/- 5%.
But I usually like to keep the Zebra at 95% to check for blown out areas.