The Tiffen 6 x 4" 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. Does the 8H come with a case to protect the unit similar to the case of the 6H?

A: Based on Zoom's website, there is no case included in the box.

Q: 2. Hello, prompt, whether there is a Russian menu language?

A: Yes, there is a Russian language menu option.

Q: 3. Can the built-in flash be tilted upward to bounce off a ceiling?

A: No. It is on a modestly complex hinge to project the flash forward and up to avoid shadow from a lens shade. This does look to work better than earlier Lumix flashes that could project lens shadow at wider zoom settings.

Q: 4. Bit confused, is this is an APS-C lens? If so, what is the equivalent on a full frame camera? (Lumix S5) Thanks !

A: The Panasonic Leica DG Vario-Elmarit 12-35mm f/2.8 ASPH. POWER O.I.S. Lens is a Micro Four Thirds mount lens, which is designed for a smaller sensor than APS-C. The full frame equivalent for Micro Four Thirds is 2x; so the 12-35mm lens will be a 24-70mm full frame equivalent. If you do have an APS-C camera, this lens would not be a viable option.

Q: 5. How is this camera in low light compared to the g7 or gh4? And is it just as good as the gh5?

A: One key to working in low light will always be fast glass. Low light suggests there will be some useable light to work with. The G85 is pretty close in marginal light to the G7, both the G7 and G85 are a bit more sensitive in low light than the GH4, and the GH5 is pretty close to the G85. I have the GH4, GX85, G85, and GH5; for serious night work I bring out the Oly 12mm f2.0, Lumix 20mm f1.7, PL 25mm f1.4, Lumix 42.5mm f1.7, and Oly 75mm f1.8.The G85 with 12-60mm f3.5 to f5.6 is an outstanding camera/lens combo that is very flexible. I highly recommend it for general use, the lens is surprisingly sharp at both ends (I have 2 of them). And the Lumix 20mm is an inexpensive start with fast glass, good 'n sharp.

Q: 6. Can you create Macros with the CleanSwitch 12X12 ?

A: Not on the CleanSwitch itself but macros may be created using the VideoHub Smart Control panel.

Q: 7. Are the following SDXC-II UHS-II U3 Cards compatible and work with the Panasonic G85:1-Delkin devices; Cinema128GB U3/V902-Delkin devices; Best 256GB 1900X3-Delkin devices; Best 128GB 1900X4-Lexar; 128GB 2000X

A: The Lumix G85 will work with all SDXC UHS-II memory cards. There are no limitations there.

Q: 8. hdmi output while recording 4K video in SD card?

A: Yes, the g85 has full 4k output via HDMI while recording to the memory card.

Q: 9. Does this lens work on an Olympus camera?

A: The Panasonic Leica DG Vario-Elmarit 12-35mm f/2.8 ASPH. POWER O.I.S. Lens with Filter Kit (Micro Four Thirds) is cross-compatible with all Micro Four Thirds camera systems.

Q: 10. Is this the best lumix for in camera Focus stacking?

A: Of the Panasonic Lumix cameras, we would prefer to use the DMC-G85 yes. More features, more control, better form factor and build quality.