The Tiffen 105mm Coarse Thread 85 Ultra Pol Linear Polarizer Filter combines both an 85 color conversion filter with a linear polarizing filter to blend the effects of both filter types into a single, convenient solution.

The 85 color conversion aspect of the filter provides a warming effect and decreases the color temperature from 5500K to 3400K, allowing the use of tungsten balanced film in daylight conditions.

The Ultra Pol linear polarizing aspect of the filter helps to greatly reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. This results in a noticeable increase in the saturation of skies and foliage, as well as clearer imagery when photographing in hazy conditions. A linear polarizer differs from a circular polarizer in that it does not supports use of a camera's autofocus or auto exposure functions; it is best suited for use with manual cameras, such as view cameras, that are not dependent on internal mechanisms to determine focus or metering settings.

There is a total filter factor of about 6x, requiring an increase of 2.6 stops for normal exposure. Tiffen filters are 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.

Color Conversion 85 and Polarizer    Warming Color Conversion Filter    5500 to 3400K Color Temp Decrease    Helps to Eliminate Reflections and Glare    Reduces Haze and Blue Cast in Landscapes    Greater Color and Tonal Saturation    ColorCore Technology

Ultra Pol linear polarizer and 85 amber color conversion filter combination.

Total filter factor of approximately 6x requires 2.6 stops of additional exposure for normal results.

Warming 85 color conversion filter decreases color temperature from 5500K to 3400K for using tungsten-balanced film in daylight conditions.

Polarizer helps to greatly reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface.

Clears up haze in distant landscapes and provides more saturated, vivid colors.

Strongest polarizing effect when used at a 90° angle from the sun.

Compared to a standard polarizer, the Ultra Pol design strives to increase the polarizing effect for enhanced reduction of reflections and greater color saturation.

Related Questions and Answers

Q: 1. Hi, this lens can work with autofocus in video filming, for example in the t6i or the new Canon 80d? (touch the screen to focus)

A: Yes sure! this is an auto focus lense and will work perfectly with you auto focus camera. This is a really good lense. Enjoy.

Q: 2. I am considering buying the 24-100mm L series f4 IS lens. Based on reviews it is an excellent lens particularly with the 50D. I have also seen reviews complaining of 'lens creep' with this lens.I have a Rebel Ti1 and a 15-85mm lens which has lens creep and it is annoying and problematic.I think the 24-105mm is the best all round every day lens to have in the bag, always on the camera. I do not want this 'creeping' problem with an expensive L series lens although I know the image quality will be good.Should I be really concerned with this potential problem?How many users find it an issue?

A: For me its a small issue.

Q: 3. What is the minimum focusing distance in macro mode and how's the performance in this mode?

A: The macro range is within 1.5 ft. However, it is not as good as using a true macro lens.

Q: 4. Can the 24-105mm/f4L IS USM be used to give Full-Frame results on a Full-Frame format Canon body, such as 5D Mark III, or the expected EOS 5 DS?

A: Yes it can be used on full frame cameras.

Q: 5. Is this lens 2.8f or 4f constant

A: I meant to add its f4 throughout the zoom range but fully adjustable to f22 depending on your settings.

Q: 6. Newbie question - does the lens extrude or extend itself throughout its focal range, or does the overall lens profile stay put?

A: The lens extends out. It would be handy if it had a lock so it doesn't extend while not in use; like hiking.

Q: 7. Anyone use this on a Sony FS7? If so what has been your experience?

A: It's not out yet.

Q: 8. is this lens good on eos 70d to make video?

A: The Canon EF 24-105mm f/4L IS USM Lens will be compatible with the Canon 70D and will work well for video.

Q: 9. Will this lens fit on a EOS Rebel XSi?

A: Yes; the Canon EF 24-105mm f/4L IS USM Lens is fully compatible with all Canon EOS cameras manufactured since 1987, which would include the Canon EOS Digital Rebel XSi DSLR camera.

Q: 10. I have a nikon D850. Is this a compatible lens and full frame?

A: Yes, I own D850 and 105 mm lens for a few weeks. The lens is compatible with D850 and D810 as well.