Using the Calculator
To Calculate a Correction Filter
- Enter the film’s, or target lights, color temperature in Color Temp 1.
- Enter the color temperature of the actual lighting in filed labeled Color Temp 2.
- Read the Mired value and choose a filter from the following table.
|Cooling Filters||Warming Filters|
E.g., if you have daylight balanced film (5500K), and you want to shoot with it in a tungsten interior (3200K) there’s a mired shift of -131, indicating you need a cooling filter of type 80A.
To Calculate the Mired Shift between two Lights
- Enter the color temp of the first light in Color Temp 2.
- Enter the color temp of the second light in Color Temp 1.
- Read the mired value:
- A Positive mired value indicates the color shifted towards blue.
- A negative mired value indicates the color shifted towards amber/orange.
E.g., if you have 2 light sources one is 5000K and one if 4000K, the difference in color from the first light to the second is 50 mireds.