The Tiffen 4 x 5" Decamired Blue 12 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. Is it PAL or NTSC?

A: This an NTSC model camera.

Q: 2. On the PODCAST, there are only 4 pre-recorded sound effects that can be played. Is there a way to see all the 12 audio effects by scrolling or something?

A: There are 13 built in sounds, all loaded into a sound pad folder which you can scroll through. Effects can be accessed in the Music App using the effects icon. Additionally, Zoom includes a free Guitar lab software that allows you to edit effects on a computer and updated patches to the recorder.

Q: 3. Is this camera suitable for macro photography?

A: Yes, with the built in macro mode, you can utilize this camera to do some great macro shooting.

Q: 4. Does this compare to a DSLR of similar price?

A: This camera would have a smaller image sensor, but would still yield great image quality and a vast array of lenses. Generally, this is for someone who needs the control of the DSLR, but in a more compact size.

Q: 5. What is the crop factor when recording 4k video? I am curious which metabones adapter would be best for this camera either the .71 or the .64.

A: roughly 2.2x crop factor in 4k video

Q: 6. Hi, this is very important to me, whether there is a menu of Russian language?

A: I just checked and it does not show a Russian Language option. My camera is for the US market. I understand that menu language options may vary from market to market. I hope this helps.

Q: 7. Does the bundled lens have stabilization?

A: Yes, the lens does have optical image stabilization. It actually is a pretty nice lens and works well with the camera. Only down side is the variable aperture with the lowest possible at just 3.5. Still, very happy with it. I think you will be too.

Q: 8. How to brighten up the LED screen? It's too dark.

A: Go to page 221 of the manual below; https://www.bhphotovideo.com/lit_files/286639.pdf

Q: 9. A TechRader pre-review said the battery grip has a headphone jack. But the grip's specs don't mention one. So, does anyone know if the grip has one or not?

A: The DMW-BGG1 does not have a headphone jack.

Q: 10. Are there any other remote options besides the shutter control remote for pictures or smartphone app? Something wired that can control zoom, focus, and iris?

A: Not that I know of. Smartphone app works. You can use a wired connection to fire the shutter only. Those are all I have found.