The Tiffen 4.5" Round 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 and grinding flat to a tolerance of 1/10,000th of an inch.

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. Will a 77mm filter fit on a mamiya rz67 90mm lens?

A: 77mm is the correct size for a filter for the Mamiya 90mm f/3.8 C Lens.

Q: 2. 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: 3. Does it fit on 67mm?

A: The filter size is "Filter Wheel 3", this is for a drop in system and is not 67mm. To find 67mm Tiffen Fog filters search the B&H website for "Tiffen 67mm Fog"

Q: 4. Is the thread for this filter 0.75mm pitch or 1mm?

A: The thread pitch would be 0.75mm.

Q: 5. can I use this on fujinon xf 35mm? which should I buy?

A: Not sure which Fuji 35mm lens you have, If you have this XF 35mm F/2, You'll need a 43mm filter. https://www.bhphotovideo.com/c/product/1191420-REG/fujifilm_xf_35mm_f_2_r.html If you have this XF 35mm F/1.4, you'll need a 52mm filter. https://www.bhphotovideo.com/c/product/1505282-REG/fujifilm_xf_35mm_f_1_4_r.html

Q: 6. Does this filter's effect result in lost of light? If so, by how many stops?

A: I found it is about 1/3 stop of light loss.

Q: 7. Does this tray hold mounted or non-mounted 4.5” round filters?

A: This tray can hold either mounted or non-mounted 4.5" round filters.

Q: 8. Does this low-light version have less of a polarizing effect than the standard?

A: The polarizing effect is the same as other polarizers. Keep in mind this is a linear polarizer and is meant for camera systems which have older exposure metering systems. Mainly used for older film cameras.

Q: 9. Will this stand accept an adapter for standard 5/8th inch microphone clips or booms? Thanks!

A: The top of the stand is 5/8. Items that have a 5/8 receiver should fit.

Q: 10. Does this have female threads so you can stack filters?

A: Yes, the Tiffen 82mm Black Pro-Mist 1/8 Filter has 82mm female filter threads on the front of the filter which allows you to connect another filter or lens cap onto the front of the Tiffen 82mm Black Pro-Mist 1/8 Filter.