In stage lighting, CTO (Color Temperature Orange) and CTB (Color Temperature Blue) are two types of filters used to adjust the color temperature of a light source.
CTO filters are used to lower the color temperature of a light source, giving the light a warmer orange hue. It is often used to simulate the warm light of room lighting or a sunset, making a scene look more natural and welcoming. CTO filters typically range in color temperature from 2700K to 6500K.
Conversely, CTB filters are used to raise the color temperature of a light source, giving the light a cooler blue hue. It is often used to turn a tungsten light source into a daylight-like color temperature, making a scene look closer to natural light or daylight.
In practical applications, CTO and CTB filters can help lighting technicians adjust the color temperature of a light source to achieve a desired visual effect, whether it is to match other light sources on set or to create a specific mood or style.
