The 105mm (Coarse Thread) Decamired Blue 1.5 Cooling Filter from Tiffen is for those who want a sure-fire way of getting accurate color temperature readings. 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.

Decamired filters are used to maintain consistent color temperature during the day's shooting. Decamired filters are available in two series - reddish filters that warm the light and bluish filters that cool the light with each series available in four densities: 1.5, 3, 6, and 12. When filters from the same series are used, they can be combined.

Decamired filters can be readily combined to create almost any required color correction. In measuring the color temperature of the light source, and comparing it to that for which the film was designed, required filtration can be easily calculated.

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.

• 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 balances the light to the film

A Simple Formula

• Mired value = 1000000 : Kelvin value
• Kelvin value = 1000000 : Mired value
• For 5600K daylight color film, the Mired value is 1,000,000 divided by 5600 = 178.6
• For 3000K artificial light, the Mired value is 1000000 divided by 3000 = 333.3
• 78.6 minus 333.33 equals -154.7 or -15 Decamired
• A positive value indicates a reddish KR filter, a negative value indicates a bluish KB filter 
• Thus, the filter required to adapt the 3000K halogen light (the slightly low value results from the mains voltage being lower than its nominal voltage) to a 5600K daylight color film is a blue Conversion Filter

ColorCore Technology

• Tiffen filters are manufactured using ColorCore technology, a closely guarded proprietary process that entails permanently laminating the filter material in between two pieces of optical glass that are ground flat to tolerances of a ten-thousandth of an inch, then mounting them in precision metal rings 
• The ColorCore process allows Tiffen to control the color and density of their filters, and the characteristics of special effects filters with much greater accuracy than typical dyed-in-the-mass filters, which usually exhibit color and density variations 

Superior Quality

• Top Hollywood motion picture studios rely on Tiffen filters for their multimillion-dollar productions 
• Superior quality and design make Tiffen the overwhelming choice of moviemakers, professional photographers and even NASA 
• Tiffen has also been awarded an Emmy, from the Academy of Television Arts and Sciences, for its engineering excellence

TIP HOW TO PROLONGING THE LIFE OF YOUR FILTERS 

Filters, like all crafted optics, are susceptible not only to breakage, but to premature aging caused by environmental factors. Most filters are made up of several layers of materials consisting of glass, dyes, optical cements, chemical compounds, particles etc. Even with protective measures employed, there are many factors that can still affect the longevity of the filter: moisture (prolonged exposure to humidity), excessive heat and excessive light are the most common environmental causes that can affect the filter’s chemistry over time.

To protect your filters and keep them in great working condition for a long time (along with the rest of your camera gear) we recommend making sure to keep the filters stored in a dark, cool, and dry place when not in use. The use of filter pouches or specialized cases will also keep your filters safe from breakage when not in use. If you are in a humid environment, the addition of fresh silica gel packs or a dehumidifier in the room they are stored is also highly recommended. Protecting your filters as you would your camera lenses will ensure many years of use of your filters.

 

 

What do you recommend cleaning filters with?

 

Hand blower first, if it's just light dust,that usually handles it.  If you need to clean further, a Kim Wipe sprayed with Tiffen/Pancro Lens Cleaner, work in a circular motion from the middle out.

 

 

We at Guru Enterprises in Chatsworth, CA thank-you for stopping by. Please keep us in mind for all your requirements in motion picture equipment in future.

 

We deal in both - New & Used Gear.

 

 

$4.99 shipping in US by First-Class Mail. $9.99 by Priority Mail & $14.99 by FedEx 2 day Air.

International Shipping will be $14.99 by Standard Shipping. FedEx Priority shipping $29.99 to most countries.

 

We can order any product from Tiffen so let us know your special requirements if you have any.

• Questions?

• Comments?

• Concerns?

• Call: 818 618-4495 - Guru Enterprises

Feedback is very important to us. We would appreciate if you would leave it for us once you have received your item. It lets us know you have received your item and are happy with your purchase.

We request that you attempt to resolve a problem by first contacting us before leaving feedback as problems tend to be a straightforward case of miss-communication.

Buyers shipping within the 36 States that require collection of Internet Sales Tax will be subject to sales tax.

(California residents will have to pay 9.5% for sales tax.)

 

We guarantee each item we sell on eBay to be exactly as described. If a buyer receives an item and is not as described, they can return the item within 14 days for a refund. Email for more information.

We strive to offer courtesy to my customers. We hope that we have described the item to complete satisfaction. Please email with any questions if we have forgotten something.

SHIPPING
We ship Worldwide.

20 HAPPY YEARS OF SELLING & BUYING ON EBAY !   Buy with confidence ~ ~ check our excellent feedback!

FAST SHIPPING

All our items are in stock and

We strive to ship within 24 hours of payment.