The Tiffen 67mm 81B Light Balancing Filter helps to decrease the color temperature by 300K in order to warm the image slightly in order to match the color quality of illumination. When using an 81B filter, you will be able to attain 3200K balance when the prevailing light source is 3500K. The warming effect of this filter requires a 0.3-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.

Warming Light Balancing Filter    Less 300K to Convert 3500 to 3200K    ColorCore Technology

Light balancing filter decreases color temperature and provides a warming effect.

Subtracts 300K in order to attain 3200K color balance from 3500K illumination.

Filter factor of 1.3 requires a 0.3-stop increase in exposure.

Related Questions and Answers

Q: 1. Are they stackable?

A: Yes, they are.

Q: 2. What are performance differences between this filter and Tiffen Haze 2A filter

A: The Haze 2A filter http://bhpho.to/1zc5mqJ will absorb virtually all UV light, whereas the UV Haze 86 will absorb 86% of UV light. The UV Haze 86 features a Digital HT Multi-Coating, which provides strength, durability and optical clarity.

Q: 3. is this a variable filter?

A: No, the Tiffen 67mm 6pt/2mm Grid Star Effect Filter is not a variable neutral density filter. The Tiffen 67mm 6pt/2mm Grid Star Effect Filter is designed to create multiple stars that appear to streak outward from the center of bright light sources in your scene. It does not vary the density of light entering the camera and cannot be adjusted, though you may rotate the filter to rotate the direction of the stars that are created by the filter.

Q: 4. Is the Tiffen Circular Polarizing filter in the Tiffen 67DIGEK3 kit the same as the Tiffen 67CP Circular Polarizing filter? If not, which is the better quality?

A: Yes it includes the 67CP filter.

Q: 5. When screwing this filter onto a lens or other filters, it doesn't tighten, it just spins and spins. It unscrews fine, but it just won't tighten. Is this normal or is there a defect with the filter I received?

A: It's hard to determine your issue without additional information. Can you please email us at techsupport@a href= http://tiffen.com? target= _blank tiffen.com?/a Please provide a copy of your B&H receipt, a short video clip taken with a smartphone in which you demonstrate the issue and your name, shipping address and phone #. We would be happy to assist you with your issue as our filters come with a 10 year warranty.

Q: 6. If I use a warming filter on a bright sunny day will it affect the colors?

A: Yes Tiffen 67mm 812 Warming Filter will affect the colors in a bright sunny day. You may need to set the white balance of the camera to custom before using the filter though.

Q: 7. does it have HT coating on lens?

A: This filter is not coated.

Q: 8. How thick is this filter?

A: This filter is 4mm thick.

Q: 9. Is it soft-edge graduated?

A: Yes.

Q: 10. What kind of metal is the frame made out of?

A: Tiffen uses aluminum filter rings for their filters.