The Tiffen 3 x 3" Decamired Red 3 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. Can this be used for Leica SL3?

A: The Leica Premium Hybrid Glass Display Protection for Leica SL2 will fit the LCD screen on the Leica SL3 Mirrorless Camera.

Q: 2. Is this also for the D-Lux 8?

A: Yes, the Leica Premium Hybrid Glass Display Protection for Leica CL, C-Lux, D-Lux 7, V-Lux 5 is also compatible with the D-Lux 8.

Q: 3. Will it work with B2 head?

A: Sort-of... It won't fit in the usual way as the cover glass on the B2 is not removable. However you can hold it in place in front of the B2 using the mounting ring of the OCF grid/gel holder. It's not the most secure mounting though - you'd need to be careful about bumping it off - or just add some gaffer tape to keep it in place. This solution does preclude use of the built-in umbrella holder on the B2.

Q: 4. how do you install it?

A: To install the Westcott Glass Dome for FJ400 Flash Head, with one hand wrap the dome around two of the metal tabs located around the flash tube. Then with your other hand use your thumb and pointer finger to push inward on the other two metal tabs and push the glass dome down and around.

Q: 5. What is the purpose of the three open slots in this glass?

A: To let heat out.

Q: 6. Is this the same some that goes on the godox bi sl150 ii?

A: No, this Godox Glass Dome for SZ200Bi is not compatible with the SL150 II.

Q: 7. What are the Dimensions of the glass?

A: These are the specifications we have for this. Shipping Dimensions: 14.25 x 11.25 x 2 , Shipping Weight: 5 lbs.

Q: 8. What are the measurements of the screen protector?

A: The Leica Premium Hybrid Glass Display Protection for Leica CL, C-Lux, D-Lux 7, V-Lux 5 corresponds to the 3" (76.2mm) LCD screen on the compatible cameras.

Q: 9. Is this a replacement for the Ikan PT-ELITE-U PT2500-G? I'm looking for a 30:70 teleprompter glass with the following dimensions:top horizontal width = 350 mm (13.8 inches)bottom horizontal width = 200 mm (7.9 inches)vertical/height = 220 mm (8.7 inches)Thanks!

A: I bought this replacement part a few time ago and i can tell you thats the good one for your prompter.

Q: 10. If I am using a zoom reflector on my B1, will this dome increase the reach of the light since it will be reflecting a little more from the sides or will the frosting decrease the reach?

A: The reach of the light is a function of the shape of the reflector. The dome just distributes the light in a more uniform pattern and reduces the hot spot of the flash head. I love the improved uniformity of the light with all my modifiers. I think the dome should have been the standard defuser. I own 6 of these.