The Tiffen 4 x 5.65" Decamired Red 12 Warming 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. 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: 2. How many stops of stabilization does this have on a camera without IBIS?

A: Although Panasonic does not state a specific number of stops the stabilization provides in the Panasonic Leica DG Vario-Elmarit 12-35mm f/2.8 lens, it is safe to say it will be about 2-3 stops. But also when using a wider angle lens camera shake blur is less noticeable as compared to a telephoto lens. Plus by having an f2.8 aperture the lens can achieve faster shutter speeds which also help reduce the risk of camera shake blur.

Q: 3. Is this lens ver2 or ver3?

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 the redesigned replacement of the Lumix G X Vario 12-35mm f/2.8 II ASPH. POWER O.I.S.

Q: 4. Can I use a Gimbal head with this tripod?

A: Yes. The included head is removable, exposing a standard 3/8 - 16 base mount. The base mount has a 50mm diameter.The supplied case requires the tripod to fold back where the head is and it's an exact fit, so you will be very unlikely to keep the gimbal head attached for transport that way.

Q: 5. Can I control the ZOOm and FOCUS of this lens from my Atem Mini Ext. SDI using a BMD Studio Camera 4k Plus?

A: No, the Panasonic Leica DG Vario-Elmarit 12-35mm f/2.8 ASPH. POWER O.I.S. Lens (Micro Four Thirds) does not have a servo zoom motor with which to zoom the lens. The lens you are looking for is the Panasonic Lumix G X Vario PZ 14-42mm f/3.5-5.6 Power O.I.S. Lens (Black), BH #PA144235XB.

Q: 6. I have a Nikon D500 what other piece of equipment would I need to buy to shot wild life and sports?

A: To shoot wildlife and sports you will need a long telephoto lens. The Nikon AF-S NIKKOR 200-500mm f/5.6E ED VR Lens is a good choice. Here is the link: https://bhpho.to/2WS0gUy

Q: 7. Can i use it on BMPCC4K ?

A: Yes, the Panasonic Leica DG Vario-Elmarit 12-35mm f/2.8 ASPH. POWER O.I.S. Lens (Micro Four Thirds) is compatible with the Blackmagic Design Pocket Cinema Camera 4K.

Q: 8. Is the smooth aperture changes so there are no sudden jumps in exposure compatible with the GH4 ? I got it to work on my GH5 by setting auto-exposure mode and blocked ISO and Shutter Speed, but it doesn't seem to work on my GH4.

A: The Panasonic GH4 when using some of the newer lenses, works better in an "M", or "P" mode.

Q: 9. Is this lens compatible with an Olympus PEN Lite E-PL7 camera?

A: Yes Panasonic Leica DG Vario-Elmarit 12-60mm f/2.8-4 ASPH. POWER O.I.S. Lens is compatible with the Olympus PEN E-PL7 Mirrorless Micro Four Thirds Digital Camera

Q: 10. 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.