The Tiffen 55mm 81C Light Balancing Filterhelps to decrease the color temperature by 400K in order to warm the image slightly in order to match the color quality of illumination. When using an 81C filter, you will be able to attain 3200K balance when the prevailing light source is 3600K. 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 400K to Convert 3600 to 3200K    ColorCore Technology

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

Subtracts 400K in order to attain 3200K color balance from 3600K illumination.

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

Related Questions and Answers

Q: 1. With daylight film in mixed incandescent lighting, how does this filter differ from the cooling color conversion filter grades?

A: This Tiffen 55mm FL-D Fluorescent Glass Filter for Daylight Film will remove the green cast of fluorescent lights. With multiple type of lighting filtration can be tricky, I would filter for the dominant light source and err towards what I believe would look most natural. i.e., warmer skin tones would look more natural than green or blue skin.

Q: 2. will these fit on a fuginon 55-200mm lens?

A: The Fuji 55-200 lens filter thread is 62mm. You will need BH# TICUS62

Q: 3. Since you are out of stock on the Tiffen 49mm Cir. Pol., can I use a linear polarizer instead on a mirrorless camera? My recollection is that Cir. Polarizer was developed to compensate for the effect of the mirror on light measurement in the camera, and if so, then shouldn’t be necessary for mirrorless camera.

A: Yes, a linear polarizer will have no effect on metering or autofocus (PDAF or CAF) in a mirrorless camera, which historically would cause metering and autofocus issues in cameras with mirrors or single-translucent lenses (SLTs).

Q: 4. 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: 5. So I was just curious does this come with any sort of case?

A: This filter comes in a hard plastic case.

Q: 6. will these fit my fugifilm XT20 18-55 mm lens?

A: The Filter thread is 58mm: BH# TICUS58

Q: 7. Does this filter have the Super Spectra coating on it?

A: I do not have an answer for this question; I just don't know. Suggest phoning Canon Support at 800 652-2666. I am using this filter on a Canon 400 f5.6L lens and have no complaints.

Q: 8. What range of sizes can this filter fit?

A: This is a 77mm filter. It will fit any lens with a 77mm filter thread on the front of the lens. Tiffen does make this and many other filters in other sizes as well. Just do a search at B&G for Tiffen Filter . You'll see many types of filters in many sizes. I srongly recommend Tiffen filters -- the price is reasonable, yet the quality is very high.

Q: 9. Whats the difference between linear and circular polarizers? Im using a matte box with a rotatable 4x4 filter tray. Thanks.

A: Both a linear polarizer and circular polarizer will give you similar results although a circular polarizer should be used on cameras with beam splitting metering systems commonly found on auto focus SLR's/DSLR's.

Q: 10. 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.