The Tiffen 95mm 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, 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. Will this VND filter fit over a B&W 67mm UV filter already on my travel (zoom) lens or do I need to remove the UV filter before I can attach this Tiffen 67VND?

A: Yes, the Tiffen 67mm Variable Neutral Density Filter can fit directly on the front of a B+W 67mm UV Filter. There is a possibility that you will have vignetting, as stacking filters on a wide angle lens can sometimes cause vignetting. If this is the case, you may need to remove the UV filter before mounting the Variable ND Filter.

Q: 2. I have the Canon R6 70-200 77mm lens. Will this work well?

A: If you own either the Canon RF 70-200mm f/2.8 L IS USM Lens or the Canon RF 70-200mm f/4 L IS USM Lens, then yes, as both of the above lenses uses 77mm filter threads, the Tiffen 77mm Variable Neutral Density Filter would be compatible for use with both aforementioned lenses.

Q: 3. 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: 4. Will this 67mm filter works on Tamron 28-200? Worrying it will not work on the wide end of the lens.

A: Yes Tiffen 67mm Variable Neutral Density Filter will fit the Tamron 28-200mm f/2.8-5.6 Di III RXD Lens for Sony E. 28mm is not extremely wide so it should not vignette.

Q: 5. Which size filter would fit the Pentax 67 105 f 2.4 lens?

A: According to my research, your lens uses 67mm filters such as this: https://bhpho.to/3IRyv6b Please check your lens cap. Often there is a number on the inside which indicates the filter size.

Q: 6. which OP/TECH Hood Hat would fit on the 82mm filter? My 82mm lens is 3.25 inch diameter but the filter has a larger diameter, I think.

A: The small would be fine and would fit nice and tight, but if you want a bit of room, the medium would be better suited since that filter measures about 3.5 in diameter and the medium hood hat is meant for front elements from 3.5"-4".

Q: 7. I just bought this filter, works great! But I am not able to use my 82mm Sensei lens cap for the ND. The ND it self seems to have a larger front diameter. What lens cap do you recommend?Thanks, -GG

A: Check out the Sensei 95mm lens cap, as the Tiffen 82mm Variable Neutral Density Filter has a front thread size of 95mm: http://bhpho.to/K9qRG6

Q: 8. Hello, I have been doing simple photography for a while, but don't know much about my equipment... so I was wondering if this filter is compatible with a canon rebel T4i with a canon EF-S 55-250mm lens? Thanks for your time!

A: This filter is the incorrect size for the Canon EF-S 55-250 lens. Instead, you will need a filter with a thread size of 58mm. Take a look at the Hoya 58mm Variable Neutral Density filter: http://bhpho.to/1kcHnEZ

Q: 9. Would this be OK on a 58-77 step up ring to allow use on a m43 lens?

A: You will be fine to use a 77mm filter on a step up ring to use on a micro 4/3 lens, however, depending on the focal length of the lens, you may experience vignette.

Q: 10. How thick is this filter?

A: This filter is 4mm thick.