Tiffen 2x3" Decamired Red Set of Warming Glass Filters

Tiffen 2x3" Decamired Red Set of Warming Glass Filters

Tiffen 2x3" Decamired Red Set of Warming Glass Filters

B&H # TIDMRS23 MFR # 23DMSR
Tiffen 2x3" Decamired Red Set of Warming Glass Filters

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  • 1Description

The Tiffen 2x3" Decamired Red Set of Glass Filters - Takes the guesswork out of determining color temperature. Acts as a conversion filter for color temperature adjustments from any point to any other point in the color temperature scale. Can be used to create "proper" coloration in unusual situations and to make creative alterations.

Applications include keeping color temperature constant during the course of the day and producing the effect of different times of day. Available in two series, reddish filters that warm the light and bluish filters that cool the light. Each series contains 4 densities: 1.5, 3, 6, and 12. Filters in the same series can be combined.

The decamired system has an advantage over the Kelvin system in that the Kelvin scale is not linear
Decamired readings provide more accurate/controllable readings than Kelvin
The difference between the Mired value of the film and the Mired value of the light is the Mired value of the correction filter that correctly tailors the light to the film

A simple formula

  • Mired value = 1000000 : Kelvin value
  • Kelvin value = 1000000 : Mired value
  • For 5600K daylight color film, the Mired value is 1000000 divided by 5600 = 78.6
  • For 3000K artificial light, the Mired value is 1000000 divided by 3000 = 333.3
  • 78.6 Mired - 333.3 Mired = -54.7 Mired, or -5 Decamired
  • A positive value indicates a reddish KR filter, a negative value indicates a bluish KB filter
    Thus, the filter required to adapt the 3000K halogen light (the slightly low value results from the mains voltage being lower than its nominal voltage) to a 5600K daylight color film is a blue Conversion Filter
    Table of Contents
    • 1Description
    Type Decamired Warming filter
    Size 2x3" (50 x 75 x 4 mm)
    Grade +1.5, +3, +6, +12
    Filter Factor Varies depending on what temperature it is being converted to
    Multi-Coated No
    Rotating No
    Effect Light balancing
    Application Architecture, interiors or anywhere where precise color balance is required
    Color Temperature Kelvin values can be converted into Mired values, which can then be added or subtracted from the Mired values of the filters
    Construction ColorCore Glass
    Front Filter Thread Size Not applicable
    Front Lens Cap Size Not applicable

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