The Tiffen 4x4" Decamired Blue 12 Cooling 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. Can I stack this filter with the Go Pro Max Lens?

A: No, the Tiffen 3-Filter ND Kit for GoPro HERO9/10/11/12 Black would not be compatible with the GoPro Max Lens Mod.

Q: 2. Will the clamp work for lenses with 114mm diameter?

A: 114mm is the maximum lens diameter that can fit into this matte box.

Q: 3. Just got this and the box itself is horizontally off next to the rail mount. When sitting on perfectly leveled rods it sits to the left making the lens sit wrong too. Anyone else got this issue? Is there any leveling adjustment I can do myself? Thanks.

A: Most advanced matte boxes, such as this one, have various adjustments. It looks as though if you loosen the silver handles next to the blue bracket on the camera right side of the mattebox, you should be able to level it properly.

Q: 4. Do these come with a case?

A: The Tiffen 3-Filter ND Kit for GoPro HERO9/10 Black does not come with a case. If you would like to get a case for the Tiffen 3-Filter ND Kit for GoPro HERO9/10 Black something like the Ruggard 4-Pocket Filter Pouch (Up to 62mm) may be a good option. See: https://bhpho.to/3tx7O11

Q: 5. I have a Digital Bolex on a zacuto recoil and a titla ff, will this work with it?

A: Adan, we don't have those to try in-house, but, so long as your equipment is compatible with 15mm LWS, you should be good to go!

Q: 6. Hi. Do any of the two Filter stages rotate to accommodate a Polarizer or a Grad filter? Can't seem to tell from the specs/photos. Thanks!

A: The 2nd stage, One closest to the lens rotates. The front stage does not. Hope this helps !

Q: 7. Is there a power on/ off button?

A: No, the Enhance GX-C1 does not have a power button. Instead it has a dial which is used to control fan speed and light brightness.

Q: 8. Will these fit the GoPro Hero 11?

A: Yes, the Tiffen 3-Filter ND Kit for GoPro HERO9/10 Black is compatible with the GoPro HERO11 Black.

Q: 9. Ikan's website says the following Additionally, you get four lens adaptors (72mm, 80mm, 90mm, 114mm) however there is no mention of the 114mm adaptor on B&H. To add to my confusion Ikan state in their specs that the largest lens for matte box is 100mm. Will this mattebox fit on a 114mm lens?

A: Good question. To clarify this, The MB-T05 comes with 2 lens adapters:80mm95mmThe Donut ring measured out to be 110mm. When you remove all accessories, the MB-T05 has a lens diameter of 114mm. So the MB-T05 only has 5 options:Nuns Knickers80mm95mm110mm114mm

Q: 10. Can we use this with a MWIR camera? This would require the use of an alternative window such as saphire. Can the window be changed out?

A: The short answer is yes . Dotworkz offers some options on the front window on their web site. However, these are limited by the window shape. So, if your supplier of optics will not make a custom shape to fit the window frame you will need to fabricate a custom frame to fit your optics.