The Tiffen 6x6" 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 and grinding flat to a tolerance of 1/10,000th of an inch. It measures 6 x 6" / 152.4 x 152.4mm.

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. Would this work if I was wanting to mount a camera on a pipe from the floor up? This would be bolted into the concrete floor below. And a PTZ camera would be on a pipe 4-6 feet above.

A: Should work.

Q: 2. Will this fit a kit lens for a Canon 80D? It is a 18-135. The 67mm lines up, I just want to make sure the thread is correct.

A: This filter will fit any lens with a 67mm filter thread diameter. Please check the specifications of your lens, or look on your lens (usually near the end) for the filter thread diameter. It is usually marked with a # and a circle with a slash through it, the sign for diameter. The # is your thread diameter.

Q: 3. Confirming this will fit my Nikon NIKKOR Z 24-70mm f/4 S Lens (Z6 II)?

A: The Nikon Nikkor Z 24-70 F/4 S Lens has a 72mm filter thread, and as such, will be compatible with the Tiffen 72mm UV Protector Filter.

Q: 4. What size filter do I need for a Nikon AF-S Nikkor 18-55mm lens? Will this one fit?

A: The Nikon 18-55mm lenses have a 52mm sized filter/cap size. See the link below for the same filter in that 52mm size: http://bhpho.to/1h0sqjy

Q: 5. What size are the 4 mounting holes?

A: .44 X .75 in. SLOT [11.2 X 19.0]mm

Q: 6. Will this work for the Olympus 14-42 f3.5-5.6 EZ ED MC zoom also?

A: Not that we are aware of. This adapter is specifically for the Panasonic 14-42mm f/3.5-5.6 ASPH Zoom Lens. We are not aware of an option for the Olympus lens at this time.

Q: 7. Multi coated?

A: Multi-coated lenses. Multi-coated lenses incorporate a combination of coatings anti-reflection, scratch-resistant, water repellent and ultraviolet protected to combine to improve the properties of your glasses.

Q: 8. Will this fit on a Olympus Tough TG-6 Digital Camera with the conversion lens adapter?

A: Yes, the Tiffen 40.5mm Circular Polarizing Filter will fit on the Olympus TG-6 when with the use of Olympus CLA-T01 Conversion Lens Adapter.

Q: 9. I am looking for filters for my sigma 30mm lens

A: The Sigma 30mm lens takes a 52mm filter, if you are looking for a polarizer, click on the link below to view your choices; https://bhpho.to/31vwmK7 Hoya and B+W are among the better brands.

Q: 10. What are the color temperature and CRI of this?

A: The manufacturer has not published these specifications for the Porta-Trace / Gagne 6x6" LED ABS Plastic Light Box (White) BH #PO66LUW • MFR #66 ABS LED.