Tiffen Decamired Glass Filters - 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. How much weight does it hold?

A: It can hold ip to 300 lb-i have tested it.No problem

Q: 2. is there a comparable box w/o logo?

A: Matthews, Alan Gordon, Kupo they are all branded with their logos.

Q: 3. 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: 4. What will be the basic set to go for? A full, a 1/2 and a Mini full?

A: Honestly, there is no basic set but it does help to buy in multiples of full boxes (whether it is regular size or Mini.) For example: 1 full plus 2 halves, 1 full plus 4 quarters, etc.

Q: 5. Is the box open on the bottom? Wondering if it can also be used as a crate

A: This is a six-sided Apple Box. No openings other than the handle ports on both ends.

Q: 6. Does this fit on BT Misfit Mattebox?

A: Please see the compatibility list at a href= https://tiffen.com/mrt-compatibility/ target= _blank https://tiffen.com/mrt-compatibility//a

Q: 7. How are these boxes held together that makes them so durable? Wood glue and...?

A: Wood glue and small finishing nails. They are strong!

Q: 8. also does this come with the rota tray like in the picture?

A: Yes, this comes exactly as you see it. One 138mm geared circular polarizing filter in the tray you see.

Q: 9. Would this wood hold into termites attack?

A: Yes, the Matthews Set of Four Apple Boxes is susceptible to termites.

Q: 10. Will this arrive at my home within 4 business days?

A: That is a B&H question