SKU: 78751803493

Tiffen 3x3" Deca Mired Set of 4 Blue Color Conversion Glass Filters

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Description

Tiffen 3x3" Deca Mired Set of 4 Blue Color Conversion Glass FiltersDefinition Decamired filters are designed to more easily handle unusual color temperature variations than the previously mentioned filters. Available in increments of both a red and a blue series, Decamired filters can be readily combined to create almost any required correction. In measuring the color temperature of the light source, and comparing it to that for which the film was designed, we can predict the required filtration fairly well. A filter

Definition

Decamired filters are designed to more easily handle unusual color temperature variations than the previously mentioned filters. Available in increments of both a red and a blue series, Decamired filters can be readily combined to create almost any required correction. In measuring the color temperature of the light source, and comparing it to that for which the film was designed, we can predict the required filtration fairly well.

A filter that produces a color temperature change of 100 deg. K at 3400 deg. K will produce a change of 1000 deg. K at 10,000 deg. K. This is because the filter relates to a visual scale of color. It will always produce the same visible difference. A color change of 100 deg. K at the higher temperature would hardly be noticed.

Example

To allow simple calculation of such differences, we convert the color temperature into its reciprocal, that is, to divide it into "1." Then, since this is usually a number with six or more decimal places, we multiple it by 106, or one million, for convenience. This is then termed the "mired value," for micro reciprocal degrees. It identified the specific change introduced by the filter in a way that is unrelated to the actual temperature range involved.

To see this more clearly, let's look at the following changes in color temperature from both the degree and mired differences. Numbers are degrees Kelvin, those in parentheses are mireds:

  • 9100 (110) to 5900 (170) = difference of 3200 (60)
  • 4350 (230) to 3450 (290) = difference of 900 (60)
  • 4000 (250) to 3200 (310) = difference of 800 (60)

    From this, you can see that, although the degree differential varies as the range changes, the actual filtration difference for these examples, in mireds, is the same.

    Calculations

    To use this concept, subtract the mired value of the light source from that of the film. If the answer is positive, you need a reddish filter; if negative, use a bluish filter. Mired-coordinated filters are termed as decamireds. Mired value divided by ten yields decamireds. The 60 mired shifts, above, would be produced by an R6 filter, where the higher values were that of the lighting. Sets of such filters generally come in values of 1.5, 3, 6, and 12 decamireds in both B (bluish) and R (reddish) colors. These numbers are additive; that is, a pair of R3's produces an R6. An R6 plus a B6 cancel each other out to produce a neutral gray.

In the Box
Tiffen 3x3" Deca Mired Set of 4 Blue Color Conversion Glass Filters
  • 4 Glass Filters
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SKU: 78751803493

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Matt
Charlottesville, US
★★★★★ 5
Great oil for BMWs
Size: 1 Quart Pack of 6
Not much too say, it's the classic oil, only thing I can note is that it came with the old packaging and all that, but it works great for my car and runs smooth and without noises or temps, good value, and fairly fast shipping, good thing I can find it on here because none of my local auto stores had it on stock.
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Calvin
Cuba, US
★★★★★ 5
The best to use, and recommended by VW/Audi with TDI engines
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The only one to use with TDIs
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Reviewed in the United States on April 8, 2026
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KatyN
Louisville, US
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Recommended oil for 2014 volvo s-60
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The recommended oil for my 2014 Volvo s-60
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Reviewed in the United States on April 24, 2026
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Amazon Customer
Fort Morgan, US
★★★★★ 4
It works.
Size: 5 Quarts, Pack of 3
Ran this for 5k and did oil analysis. It performed identically to Mobil 1 ESP 5w30. No issues, stayed in grade, nothing negative. That said, it was no better than ESP and wear metals were functionally the same as multiple other similar rated oils. It’s perfectly fine, but not better. It’s a great value. I wouldn’t use it for extended oil change intervals. No oil consumption noted.
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Carol
Lake Worth, US
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Great oil
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Love it.
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Reviewed in the United States on April 18, 2026

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