This 6.6 x 6.6" Tiffen 81EF/ND Filter 6.6" - 3-Stopblends 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 6.6 x 6.6" / 167.6 x 167.6mm.

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. I have a Sony Zeiss Vario-Tessar T* FE 16-35mm F4 ZA OSS lens. The filter diameter is 72mm. What size do I need to fit this ND FIlter? If I choose 72mm, won't vignetting occur at 16mm? I've heard this filter is thick.

A: You will need to get a thin 72mm filter, I would recommend the Cokin nd, click the link below to view; https://www.bhphotovideo.com/c/product/1487120-REG/cokin_cnv2_72_nuances_variable_nd_2_400.html

Q: 2. I want to thread a step down ring on the outside of the 82mm in order to mount a padcaster teleprompter, what is the outside size? 87mm?

A: According to Tiffen, the exterior diameter of the outer ring on the Tiffen 82mm Variable Neutral Density Filter is 3.851 inches, or 97.82 mm.

Q: 3. Hello,Do you know how thick is it?Thanks,Michael

A: Tiffen 4x4 filters are 4mm thick.

Q: 4. Will this work on a Nikon 200mm F2? The filter is installed near the rear element.

A: This filter is designed to thread onto the end of a lens which has 52mm filter threads. It is not a drop in filter.

Q: 5. Does it have IR protection ?

A: It is not rated for IR, This is a Neutral Density filter, but I yet have to come up an IR issue using it with my Sony A7RII. If you have IR issues with your sensor often like color shifts I suggest you correct those with a proper IR filter first. A Variable Neutral Density filter works by juxtaposing 2 polarizing filters so there is a highly modified light spectrum left, I wonder if you should be worring about IR at the end. Enjoy. This filter is a game changer specially on travel and run and gun.

Q: 6. Is it fit with sony 24 mm GM

A: Yes, this will work well on the Sony 24mm f/1.4 GM prime lens.

Q: 7. Is this compatible with the Moment Cinebloom filter? Can I use both at the same time?

A: While this could be screwed into the front of a Moment 72mm CineBloom filter, there is a chance of vignetting on wide angle lenses.

Q: 8. Will this work in the lee 4x4 filter holder?

A: Tiffen ND filters are 4mm thick, while Lee filters are 2mm thick. This will work in the Lee holder as long as you have the one which you can modify to accept 4mm filters. Tiffen will be releasing a filter holder designed to hold two 4mm filters within the next few months. Keep an eye out for the Pro 100 Series Filter Holder, coming soon.

Q: 9. I want to use this filter on Schneider Super-Angulon XL 5.6/58mm lenses. (approximately 17~17.5mm equivalent to 35mm). And I want to use it mainly in the 2~6 stops range. In this case, will the "X" pattern appear?

A: I have used this with no problems. On a Sigma 10-20mm and bracketing shots in Manual and Aperture priority.. Never had any Side affects.

Q: 10. What type of filter do you use to get knife photography twinkle lights

A: To get twinkle lights when photographing a knife, you need to do a double exposure with the Hoya Star 8X Filter (77mm), BH #HOS877Z, and a grain of wheat bulb attached to a battery. You could get the bulb at a hobby shop.