The Tiffen 52mm 81EF Light Balancing Filterhelps 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.

Warming Light Balancing Filter    Less 650K to Convert 3850 to 3200K    ColorCore Technology

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

Subtracts 650K in order to attain 3200K color balance from 3850K illumination.

Filter factor of 1.5 requires a 0.6-stop increase in exposure.

Related Questions and Answers

Q: 1. Does this filter suit Canon 514 XL super 8 camera?

A: We recommend that you contact Canon for the filter thread specifications for this camera. This information may also be available labeled near the lens or in your manual.

Q: 2. What kind of metal is the frame made out of?

A: Tiffen uses aluminum filter rings for their filters.

Q: 3. What Nm is this filter? 720? 950? thanks!

A: This filter allows zero light to be passed below 580nm, at 700nm is allows 86.5% to pass.

Q: 4. Which camera/lens brands do these filters can be used with? I have a Canon EOS Rebel T6

A: This filter kit will work with any camera lens which has 58mm filter threads

Q: 5. Does this filter add a color cast to the image?

A: Yes when it’s at its darkest. Makes everything blue and unusable. Other than that no. I still get a lot out of it.

Q: 6. Will these filters cause vignetting on a 12mm Rokinon f2 lens (mirror less)?

A: Hi, I have used 14mm and 8mm Rokinon lenses (which are fantastic by the way) but there would be no way to attach these filters onto them because the lens curves out, and there were no threads on mine so I'll assume there's no threads on yours either. Because of the fish-eye character of the lens using a larger 4 ND glass in a holder may work for the center area but would vignette on the edges of the frame. Good luck.

Q: 7. Do these filters have screw on threads so you can stack filters?

A: Yes, the fronts of the filters are threaded at 77mm size also so you may stack them upon one another.

Q: 8. How thick is this filter?

A: This filter is 4mm thick.

Q: 9. 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: 10. Is this filter multicoated?

A: no