The Tiffen 95mm Coarse Thread 81EF Light Balancing Filter helps 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, grinding flat to a tolerance of 1/10,000th of an inch, and then mounting to precision metal rings.

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. I can see a bit of threading on the front of the 62mm and 67mm Tiffen VNDs. Can you tell me what the diameter is of each of those? I realize it is not much, but it is there, and I would like to try and use it.

A: Unfortunately the Tiffen VND filters do not have front threads. The front of the filter is larger than the rear threads in order to reduce the risk of vignetting.

Q: 2. what size lens cap to buy for the 52mm?

A: I would recommend the Kaiser 57mm Push-On Lens Cap, B&H # KALC57, as a slip-on lens cap for use on the Tiffen 52mm Variable Neutral Density Filter, or the slightly smaller Kaiser 56mm Push-On Lens Cap. B&H # KALC56, for a more snug fit.

Q: 3. Will this work with Tamron 150-600 g2 nikon mount?

A: Yes, the Tamron SP 150-600mm f/5-6.3 Di VC USD G2 can accept the Cokin Z-Pro Series Filter Holder Adapter Ring (95C, Coarse Thread).

Q: 4. Can I use this on Nikon 24-70 and Nikon 17-35?

A: This filter is usable on both the 24-70 and 17-35mm lenses, however, on the 17-35mm lens, you may experience vignetting on the wider focal lengths.

Q: 5. 1. The description doesn't tell if there is a filter thread. My question is, can I stack another 77mm ND filter on top of this filter to further increase perhaps 3 stops ND effect?2. I was wondering if I use a step up ring, will vignetting disappear? Say if my lens has filter size of 67mm, and I use a step up ring to put on this 77mm ND filter. Since the filter is larger, will be reduce or able to even avoid vignetting issue for wide angle lens such as 12mm etc.? Thank you!

A: There are no front filter threads on the Tiffen 77mm Variable Neutral Density filter. If you use a 77mm variable ND filter on a 67mm lens with a step up ring, this will help to decrease vignetting, yes. There is, however, no guarantee that vignetting can be eliminated in this way.

Q: 6. I have a Nikkor 18-200 lens with a 72 mm thread. Can this 77mm VND Filter be used with a step-up ring (72-77) on my Nikkor and Nikon D7000 DSLR?

A: Yes, that will work well.

Q: 7. Can you or should you stack a ND Filter over a Circular Polarizer?

A: If the Circular Polarizer filter attached to the camera female filter threads on the front of the filter, then yes, it is possible to stack an ND filter on the front of the lens. Depending on the filters' thickness and the lens' focal length, this may cause some vignetting in the corners of the image, but it is possible for usage when you need both darkening of the scene as well as polarization of the scene.

Q: 8. what is the definition of coarse thread ?

A: Coarse thread would refer to a lens filter with a pitch of 1, instead of the standard 0.75 pitch. Most filters between 39-82mm and 127mm use the 0.75 standard pitch. Filters sized 86-112mm and 122mm are typicially 1 pitch, or coarse thread. In any case, you simply need to purchase the filter that is designed for the filter thread size of your lens. The manufacturers concern themselves with making the correct pitch or thread size for the designated filter size.

Q: 9. Does this fit Nikon Lens threads?

A: Peter, B&H lists the lens filter thread specifications at the web page below as having a 1.0 pitch, which is a coarse thread.a href= http://www.bhphotovideo.com/c/product/1175034-REG/nikon_af_s_nikkor_200_500mm_f_5_6e.html target= _blank http://www.bhphotovideo.com/c/product/1175034-REG/nikon_af_s_nikkor_200_500mm_f_5_6e.html/a

Q: 10. Is the filter metal or plastic?

A: Tiffen filter rings are made of anodized aluminum and all of our filters without an IR element come with a 10 year warranty.