The Tiffen 4x4" Decamired Red 6 Glass Filter- For those who want a sure-fire way of getting accurate color temperature readings, the decamired system is the way to go. Using this formula, you can transpose temperatures from one point to another easily and quickly. This system is also useful when you wish to bring a certain amount of creativity to color photography.

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.

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

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.

Used for Temperature Control    Available in Specific Increments    Warming and Cooling Variety

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

Related Questions and Answers

Q: 1. This can work with lens SIGMA 18,35mm ? Blackmajick 6K ? All of my lens it's Sigma's! Let me know plz

A: The Tilta 4x4" Lightweight Matte Box will work with any lenses that are 114mm or less in diameter.

Q: 2. Can this be used for Digital Video Cameras?

A: The Tiffen 82mm Water White Glass NATural IRND 0.3 Filter (1-Stop) can be used on a Digital Video Camera that has a lens with 82mm filter threads.

Q: 3. Will this eliminate the red cast to black clothes when in heavy IR environments?

A: The Tiffen 77mm Water White Glass NATural IRND 1.2 Filter (4-Stop) won't remove red cast on black clothes if the issue is infrared bleed into the image. In a situation like that I recommend an infrared cut filter like this Hoya 77mm UV and IR Cut Filter. https://bhpho.to/3KzFuD9

Q: 4. Will this fit in the ikan Tilta DSLR Shoulder Kit?

A: Im not sure what that kit is. These filters fit any 4x4 matte box.

Q: 5. what is the difference between this version and https://www.bhphotovideo.com/c/product/752037-REG/Tiffen_W72IRND12_72mm_IR_ND_1_2.html ?

A: The Tiffen 72mm Water White Glass NATural IRND 1.2 Filter (4-Stop) is the replacement for the Tiffen 72mm Water White Glass Full Spectrum IRND 1.2 Filter (4-Stop). It Natural does a better job on color.

Q: 6. Will this fit a Nikon 3200D lens?

A: The Hoya 52mm Red #25A HMC Multi Coated Glass filter is designed to be used with black and white film camera lenses, however it can be used on digital lenses with a 52mm filter thread. You will need to custom set your camera's white balance to avoid color casting. This will fit the kit lens that is included with the D3200.

Q: 7. Can I still easily hood on/off the lens 24-105 G and/or 100-400 GM that has this filter on ?

A: This filter screws into your front filter threads and is not significantly wider than the front of your lens. Depending on what type of hood you have, you can screw it into the front filter threads on this filter or on the bayonet mount on the end of the lens with no issues.

Q: 8. Is it possible to see through this in daylight to compose the shot?

A: Hola, si, con estos filtros puedes componer sin perder composicin. No tienen color como otros. he usado Lee y te dan un tono morado, estos no. (Hello, yes, with these filters you can compose without losing composition. No color other. I used Lee and you get a purple hue, they do not.)

Q: 9. Has anyone used this filter on an underwater camera? Results?

A: I dont use this filter in underwater camera. See some informations in uwphotographyguide

Q: 10. Hi does this set come with a filter pouch?

A: Yes, the Cavision set of 4x4 Glass Filters comes with a filter pouch.