The Tiffen 5 x 5" Decamired Blue 1.5 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 Vello Universal Accessory Shoe Mount with1/4 come with this or would i need to purchase it seperatly?

A: Yes it comes complete

Q: 2. I have a Canon 7D and 430 Canon flash would this be a good bracket for me?

A: I purchased this bracket last year and as I started using it I noticed that the bracket is constructed of soft aluminum and that is not sufficiently sturdy for a wedding photographer like me. I also notice that the pivot mechanism to rotate the camera does not lock in place and that it moves. As you rotate is not a smooth rotation like from a central point but it lifts like a toggle therefore lifting the camera and it hits the top part of the flash. The lower knob that secures the camera is not easy to make it tight specially if you have large fingers and the camera may come loose make sure is tight. The adhesive on the cork is of low quality I preferred a stronger design like medium durameter rubber. The top part for your flash, make sure that your flash has a metal base, if it's plastic it will crack it. Over all it depends what you are using the bracket for but in my opinion it did not do the job.

Q: 3. Does this work in manual flash mode? TTL is too slow to recycle when shooting. Other cables do not work in flash manual mode.

A: The Vello Off-Camera TTL Flash Cord for Sony Cameras with Multi Interface Shoe (1.5') will allow for manual flash firing with flashes that can fire in manual on the Sony Multi Interface Shoe.

Q: 4. Can this be used with camcorders? Can this be used with video?

A: The unit is designed for medium-sized SLR cameras. CHECK THE DIMENSIONS. I THINK IT WILL WORK WITH VIDEO CAMERAS, IF THEY FIT THE BRACKET

Q: 5. Is this flash cord compatible with the Flashpoint Zoom Li-on X R2 TTL On-Camera Round Flash Speedlight For Sony (Godox V1) ?

A: Yes Vello Off-Camera TTL Flash Cord for Sony Cameras with Multi Interface Shoe (6.5') is compatible with Flashpoint Zoom Li-on X R2 TTL On-Camera Round Flash Speedlight For Sony (Godox V1)

Q: 6. Would this work with a Canon 5DMII and battery grip and easily switch to vertical-portrait position without hitting the side of the handle?

A: There is 9in from the bottom bar to the top bar, so if your camera with batter is less than 9in is should work for you, I hope that helps

Q: 7. Will this unit support the use of 24mm - 70mm zoom lens which is quite heavy?

A: I feel it would. I have used it with my 70-300

Q: 8. will this work with Rotolight Elinchrom EL-Skyport Transmitter Plus HS for Sony? So that I can use a cage

A: Yes, the Vello Off-Camera TTL Flash Cord for Sony Cameras with Multi Interface Shoe (1.5') shoudl work with a Sony Multi-shoe and the Elinchrom EL-Skyport Transmitter Pro for Sony.

Q: 9. will this auto focus on d5300 pl?

A: Yes, the Tamron SP 150-600mm f/5-6.3 will autofocus on a Nikon D5300.

Q: 10. Will this work with Sony A58

A: yes , camera only , no battery grip