The Tiffen 4 x 5" Decamired Blue 6 Cooling 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. What's the difference between version 1 and 2?

A: I have V2, not sure what's the difference to V1. In any case is absolutely perfect for camera, spare lens and a few small gadgets. If you travel light, that's the bag. I trust it would work for running lovers as well. Add straps can make package very stable.

Q: 2. Does the strap presses to your neck? I hate straps rubbing at my skin.

A: It's quite comfortable and sits on your shoulder and back very nicely.

Q: 3. Will the thinktank turnstyle 10 hold the d780 with attached 24-120 f4 plus the tamron 17-35 f2.8-4?

A: Yes, Think Tank Photo TurnStyle 10 V2.0 Sling Camera Bag will hold the Nikon D780 DSLR Camera with 24-120mm Lens attached and offer additional space for Tamron Zoom Super Wide Angle SP AF 17-35mm f/2.8-4 Di LD Aspherical IF Autofocus Lens.

Q: 4. Can this bag hold a Panasonic G9 with 35-100 attached and 12-35 lens?

A: Yes, the Think Tank Photo TurnStyle 10 V2.0 Sling Camera Bag (Charcoal) can hold the Panasonic G9 with the Panasonic 35-100mm lens attached and also the Panasonic 12-35mm lens.

Q: 5. Will this fit an Olympus OM-D E-M1 II with oly 14-40/2.8 attached, as well as an oly 40-150/2.8? Or should I look at the 20?

A: The Turnstyle 10 interior dimensions are 12.6 x 7.1 x 4.8" / 32 x 18.03 x 12.19 cm so it will fit your 14-40 and 40-150 Olympus lenses plus the camera.

Q: 6. Can I fit a iPad Pro 10.5 in there?

A: Not very easily. I have an 10.5 and it fits on the inside pocket, but only if the bag is relatively empty. Unfortunately not in the back pocket, that really is smaller than expected but perfect for a smaller ipad or moleskine.

Q: 7. Will this bag hold: A Z5 with attached 24-50 f4-6.3 FTZ adapter Nikon afs DX 10-20 mm lens Battery charger

A: Yes, you will be able to fit the body and the lens, with a charger.

Q: 8. Will a Nikon D5600 with an attached Tamron 16-300 mm lens fit and be well padded?

A: Yes the Think Tank Photo TurnStyle 10 V2.0 Sling Camera Bag (Blue Indigo) is large enough for the Nikon D5600 with the Tamron 16-300mm f/3.5-6.3 Di II VC PZD MACRO Lens attached. And is well protected.

Q: 9. How much can this bag be compressed to fit inside checked bag? Full kit in carry on backpack, want sling bag for walking around.

A: Still has some rigidity to it but can be rolled up nice and small to fit in a carry on.

Q: 10. Can it be rigged to attach/ carry a tripod?

A: There is no tripod attachment