ExpoImaging: http://expoimaging.net/ | tips | history | video help | see it |
In most situations, even the best DSLR cameras' automatic white balance or white balance presets -- sunlight, fluorescent, tungsten -- can't match a custom white balance created by an ExpoDisc or an ExpoCap. These example cases show the improved results an ExpoImaging custom white balance can create in a variety of lighting situations.
ExpoDisc Video White Balance Solution for Digital Video
ExpoDisc Digital White Balance Filter
provides a fast and easy custom white balance solution
for videographers, and turns what has been a difficult color management
problem into a simple routine.
Simply read and set white balance with the ExpoDisc in place to consolidate several on location and post processing steps into one quick and easy custom white balance procedure. Get the same consistent, accurate color without the need to worry about the accuracy of the camera's own auto white balance (AWB), or fumble with cumbersome cards and targets.
Each ExpoDisc is manufactured and individually hand calibrated to fall within strict tolerances of light transmission and color neutrality. Consisting of multiple layers of carefully selected materials, the ExpoDisc is guaranteed to be within +/- 2% of neutral for demanding professionals.
Here is how it works:
Varying levels of colorcast typically occur in digital image capture and require compensation as part of the process to create video with good color fidelity.
Blue, green, red and yellow colorcasts are not uncommon. Until now, videographers have had to rely on gray/white cards and targets to solve this problem.
But the ExpoDisc acts just like an 18% gray card when used to measure the incident light, and as such can be used instead. The sophisticated design enables the ExpoDisc to receive, scramble and passively transmit mixed light from a wide angle in front of the disc through to the image sensor for a more accurate and efficient white balance correction.
Simply take a white balance reading with the ExpoDisc installed, and your video camera will compensate for and neutralize the colorcast it sees through the ExpoDisc.
ExpoDiscs are available for professional lenses in six standard sizes from 58mm to 82mm. Additional sizes are available in 4x4 and 4x5.65 configurations for professional video filter box systems from Arri, Century, Chrosziel, Lee, and Schneider.
ExpoDiscs come in a variety of models to fit your particular video setup.
JOHN
LONGENECKER |
