The Schneider CTB Filter is designed to balance color temperature from tungsten lighting toward daylight in incremental steps. Cinematographers then have control to correct as much or as little of the scene or exposure. This gives the advantage of color correcting while maintaining low noise levels at minimal light levels.
The Schneider CTB color correction filters maintain a high MTF (modulation transfer function). Like all Schneider professional filters, the CTB filters are manufactured from crystal clear, water white optical glass that is diamond cut, precision ground and polished to the most exacting tolerances.