The Tiffen 49mm 81 Light Balancing Filter helps to decrease the color temperature by 100K in order to warm the image slightly in order to match the color quality of illumination. When using an 81 filter, you will be able to attain 3200K balance when the prevailing light source is 3300K. 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 100K to Convert 3300 to 3200K    ColorCore Technology

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

Subtracts 100K in order to attain 3200K color balance from 3300K illumination.

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

Related Questions and Answers

Q: 1. I have a sigma 10-20 wide angle lens.Will this filter cause vignetting?

A: The Heliopan 82mm Circular Polarizer Slim Filter will have about the least vignette on the Sigma 10-20mm lens but set at 10mm you will get some with pretty much any polarizing filter.

Q: 2. Will this work with the new Tamron 35-150 f2/f2.8 E mount?

A: The Tilta Seamless Focus Gear Ring (81 to 83mm) would not fit on the Tamron 35-150mm f/2-2.8 Di III VXD Lens (Sony E) as it has a diameter of around 89mm. It would be recommended to measure the size of the control ring that you would like to mount the gear ring on in order to get the best fit.

Q: 3. Is the front ring of this Urth 72mm CPL filter threaded to accept other 72mm accessories ?

A: Yes, this 72mm Urth Circular Polarizer Filter is threaded in front to accept other 72mm accessories.

Q: 4. Would this filter work with an unmodified Canon EOS 80D?

A: Yes the Hoya 49mm R72 Infrared Filter can work with a lens that is attached to a 80D.

Q: 5. What's the zoom ring size for rf 15-35 and rf 70-200?

A: Unfortunately, The new Canon RF lens models have not yet been tested by Tilta. Tilta provides the following ruler to help you measure your lenses for their Seamless rings. https://bit.ly/3oUrrgH

Q: 6. Any experiences with the Sigma 18-35 and Sigma 50-100? Which size would be best?

A: The Sigma 18-35mm Art lens has a 78mm diameter, you would need BH #TITAFGR788 instead. While the 50-100mm has a 93.5mm diameter and you would need a universal gear like BH #WILU for that one. https://bhpho.to/3kOCoMI https://bhpho.to/309Ib7v

Q: 7. Is this designed for digital cameras such as Mirrorless??

A: Yes this filter can be used with a mirrorless camera.

Q: 8. Would this work for Canon RF 24-70mm lenses made for Canon mirrorless cameras?

A: You're better off with the 88mm to 90mm ring if you're using the Canon RF 24-70mm f2.8 lens.

Q: 9. I have a leica Q (bought with B&H). do I need adapter, or it can be fitted perfectly?

A: If the thread size of your lens is 49mm this filter will work fine.

Q: 10. How good is it? Has anybody used it?

A: I have one on my Tokina 11-20 and it works fine. I chose it because of the coatings on each side as wide angle lenses can be prone to flair when shooting into or near the sun. I have other Hoya filters on other lenses that I am very pleased with. 52mm and 77mm.