Services - Cinematography Tools - Lighting Colour Correction Filters / Gels Guide

Filter Approx. Mired Shift Typical Use
Full CTO +159 Converts Daylight to 3200° K
3/4 CTO +124 Converts Daylight to 3600° K
1/2 CTO +109 Converts Daylight to 3800° K
1/4 CTO +64 Converts Daylight to 4600 ° K
1/8 CTO +26 Converts Daylight to 5500° K
     
Double CTB -274 Converts Tungsten to 20000° K Daylight
Full CTB -137 Converts Tungsten to Photographic Daylight
3/4 CTB -112 Converts Tungsten to 5000° K Daylight
1/2 CTB -78 Converts Tungsten to 4300° K Daylight
1/4 CTB -35 Converts Tungsten to 3600° K Daylight
1/8 CTB -18 Converts Tungsten to 3400° K Daylight
     
NOTE: This table is intended as a guide only.
Mired values vary between gels from different manufacturers.
They may also vary between gels from different batches and with age, exposure to heat and exposure to light.

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