SKU: 27300599909

Tiffen 3x4" Deca Mired Set of 4 Red Color Conversion Glass Filter

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Description

Tiffen 3x4" Deca Mired Set of 4 Red Color Conversion Glass FilterDefinition 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 3x4" Deca Mired Set of 4 Red Color Conversion Glass Filter
  • 4 Glass Filters
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SKU: 27300599909

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Rmanuel
Whiting, US
★★★★★ 1
Paid for new, received used.
Size: 9.5 Wide, Color: Cognac, Size: 9.5 Wide, Color: Cognac
Arrived dirty as if someone whore it for more than a few days. Maybe I was mistaken, but I saw nothing about “previously used” on the Amazon page. Returned it. I would suggest that the company use quality control when it comes to shipping. The shoes seem find otherwise. I ordered 9.5 and it was just a bit tight. If I reorder I will go for size 10.
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Reviewed in the United States on June 11, 2026
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Fletch
Pawtucket, US
★★★★★ 5
Overall Great.
Size: 10.5 Wide, Color: Black
Great product. Great value. Great style. Overall great.
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Reviewed in the United States on March 3, 2026
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B.J. G
Louisville, US
★★★★★ 3
Decent Shoes with Misleading Description (Not Leather)
Size: 12 Wide, Color: Black, Size: 12 Wide, Color: Black
I only look for leather when I’m purchasing dress shoes. Under the description “details” on this item it lists the shoe as leather upper and inner lining. A photo shows “genuine Napa leather lining”. If you keep reading (which I have now that I’ve received the shoes) it shows “faux leather” in the small print and that is not “leather”. I run a small leather business and this irks me because it’s clearly false advertising. The details also show the product is made in Brazil but when they arrived today, the shoe tag shows “Made in China” and “Man Made upper and lower”. I don’t hate the shoes. They look nice. What I know is they won’t hold up over time like leather, which is why the description should be accurate and not misleading.
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Reviewed in the United States on March 28, 2026
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Amazon Customer
Dallas, US
★★★★★ 5
Great Shoes
Size: 10, Color: Cognac
Love these shoes super comfortable and look great. Everyone asks me where I got them.
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Reviewed in the United States on May 20, 2026
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Amazon Customer
Chelsea, US
★★★★★ 5
Beautiful shoe but too narrow
Size: 10 Wide, Color: Navy Grainy Leather
Too narrow
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Reviewed in the United States on May 24, 2026

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