The Tiffen 138mm 81EF Light Balancing Filter helps to decrease the color temperature by 650K in order to warm the image slightly in order to match the color quality of illumination. When using an 81EF filter, you will be able to attain 3200K balance when the prevailing light source is 3850K. The warming effect of this filter requires a 0.6-stop increase in exposure for normal results.
This filter is made using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass, grinding flat to a tolerance of 1/10,000th of an inch, and then mounting to precision metal rings.
Type: Amber light balancing Size: 138 mm Grade: 81EF Filter Factor: 1.5 (0.6 stop) Effect: Decreases color temperature Application: For adjusting 3850K illumination to 3200K Color Temperature: -650K Construction: ColorCore glass Front Filter Thread Size: 138 mm Front Lens Cap Size: 138 mm
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
If you want to share this elsewhere, you can click the link below to copy it