This 4 x 5.65" Tiffen 81EF/ND 3-Stop Filter (4x5.65")blends both an amber light-balancing 81EF and a 0.9 neutral density filter. The ND filtration provides a 3-stop exposure reduction for darkening the entire image in order to photograph with a wider aperture or slower shutter speed than normally required. The 81EF filtration covers the entire filter plane and lessens the color temperature by 650K, enabling the ability to attain 3200K balance when the prevailing light source is 3850K.

This filter is made using ColorCore technology, a process that involves laminating the filter substrate between two pieces of optical glass and grinding flat to a tolerance of 1/10,000th of an inch. This filter measures 4 x 5.65" / 101.6 x 143.5mm.

0.9 Optical Density    ColorCore Technology    Warming Filter to Decrease Color Temp    ND Filter to Increase Exposure Length

Combination of both an amber light-balancing 81EF and an ND filter.

0.9 ND filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required.

81EF light-balancing filter decreases color temperature and provides a warming effect.

Related Questions and Answers

Q: 1. how many filters are in this kit?

A: This is one filter.

Q: 2. 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: 3. 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: 4. can i use it with canon lenses such as 70-200mm, or 50 mm?

A: The Tiffen 77mm Variable Neutral Density Filter can be used with lenses that have a filter thread of 77mm. The Canon 70-200mm f/2.8L has a filter thread of 77mm, and lens and filter combination is compatible. However, the Canon 70-200mm f/4L has a filter thread of 67mm and will need a 67mm filter bhpho.to/1lkVPtOThere are numerous versions of the Canon 50mm lens, and none of these lenses have a filter thread of 77mm. For the Canon 50mm f/1.2L, you will need a filter with a thread size of 72mm http://bhpho.to/1pBQ3VJ, the 50mm f/1.4 will need a filter thread size of 58mm http://bhpho.to/Urhszp, and the 50mm f/1.8 will need a filter with a thread size of 52mm http://bhpho.to/1kML3gr

Q: 5. What size lens cap fits the Tiffen 82 mm variable ND filter? Thank you!

A: The Tiffen 82mm Variable Neutral Density Filter does not have front filter threads, so standard lens caps are incompatible. The Kaiser 100mm Push-On Lens Cap, BH #KALC100, is a little large. Adding gaffer tape around the inside edge does allow the cap to fit.

Q: 6. Will this Tiffen ND filter provide true color images? i.e., convey the same color compared to without the ND filter?

A: No, the Tiffen 77mm Variable Neutral Density Filter, will function like a polarizer to achieve the variable effect, which will change the hue of the image, similar to a polarizer.

Q: 7. The spec says Front Filter Thread Size86mm , so can I use a normal 86mm lens cap on the outside of the filter? Thanks!

A: You should be able to use you 77mm lens cap. I do with mine.

Q: 8. Tamron 16-300?

A: Yes the Tiffen 67mm Variable Neutral Density Filter can be used on any lens that has 67mm front threads such as the Tamron 16-300mm.

Q: 9. For the 77mm version, is the reported green cast, X uneven fading AND/OR image degradation (softness, etc) starting to appear more easily in 24mm focal length or wider (on Full Frame cameras)?And are those issues appearing WITHIN the Start and End marks? At what point aprox.?Thank you!!

A: What green cast are you referring to? There are no known issues with green cast with the Tiffen VND filter, perhaps you are referring to the IRVND?The X Bar effect is a function of optical physics when combining two circular polarizing filters to make a VND. This effect happens with all manufacturers VND filters and does not indicate a problem with the filter. The X Bar effect typically appears when shooting at wide angle and at higher density settings on the VND filter, you will see this effect appear sooner with a full frame camera than with a cropped sensor camera. To correct this look through your viewfinder and reduce the density on the VND filter, change your focal length by zooming in or a combination of both until the effect goes away. The X Bar effect can happen within the Min and Max settings, especially at darker densities on full frame cameras. You should never adjust the VND outside the Min and Max settings.

Q: 10. i dont know anything about NDs, so how does this compare to Genustech Eclipse ND Fader Filter

A: This is a variable ND which gives you 2 to 8 stops of light control. It won the Variable ND Shootout, see the review at the link below. It comes with an outstanding 10 year warranty and is Made in the USA.a href= https://www.youtube.com/watch?v=nECdBiu5Rrw target= _blank https://www.youtube.com/watch?v=nECdBiu5Rrw/a