Tiffen

Tiffen 4x5.65" Combination IR 85 and 1.2 Neutral Density Filter

SKU: TF45IR85ND12 MFR: 45650IR85ND12
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About the Tiffen 4x5.65"" Combination IR

Tiffen Combination 85 IR and 1.2 Neutral Density (ND) Filter - What do you do when you must take some photos outdoors and all you have left is tungsten film? Using tungsten film in daylight will produce a bluish cast in the photograph. The 85 series of filters will "bring back", i.e. color balance the tones in your images. These yellow filters are used to correct differences in color temperature between the recording medium (film/video) and the light source.

Color shift is a critical factor in digital photography. This color shift is directly affected by the infrared spectrum. Specifically, in high definition photography, the sensitivity of imaging sensors to IR has become a challenge. This is particularly evident when using standard neutral density filters that absorb visible light but pass infrared. Unlike many photographic films, the CCD or CMOS of a digital camera is inherently susceptible to infrared contamination, even when the manufacturer attempts to reduce this problem by adding an infrared absorbing filter on top of the image sensor.

Because this filter do not have a sharp cutoff at the infrared wavelengths there has to be a compromise in order not to exclude visible red wavelengths. This results in some infrared wavelengths being allowed to pass. While minor infrared contamination does not normally cause much of a problem for visible images, when using conventional neutral density filters especially denser grades, this issue is multiplied by the filter factor.

Tiffen 4x5.65"" Combination IR Features

  • An 85 decreases the color temperature from 5500-3400 Kelvin
  • To enable slow shutter speeds to be used, especially with high speed films, to record movement in subjects such as waterfalls, clouds, or cars
  • To decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their background
  • To decrease the effective ISO of high speed film (above ISO 400) and allow it to be used outdoors in bright situations
  • To allow cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure
  • Tiffen filter is manufactured using ColorCore technology, a closely guarded proprietary process that entails permanently laminating the filter material in between 2 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

Tiffen 4x5.65"" Combination IR Specifications

Filter type Combination 85/ND
Grade 1.2 (4-Stop)
Filter Factor ND: Reduces ISO to 1/16
85: 1.8 (+2/3 stop)
Multi-Coated No
Rotating No
Effect ND: Reduce the amount of light reaching the film
85: Removes excessive blue from images and produces more natural colors
Application ND: To use high speed films in bright sun
85: When pleasing color balance is desired when shooting with tungsten film outdoors
Color Temperature ND: No change
85: Decreases the color temperature from 5500-3400 Kelvin
Construction ColorCore Glass
Size 4 x 5.65" (100 x 140mm, 4mm thick)
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