The 6.6 x 6.6" Tiffen Attenuator Graduated ND Filter 6.6x6.6" 4-Stopis compatible with filter holders that can accommodate 4mm-thick, 6.6 x 6.6" rectangular filters. It is densest across one edge, which corresponds to a reduction of light entering a lens by 4 stops and tapers to clear at the opposite edge. This gradation can be used to selectively darken an image from edge to edge, allowing for wider apertures or reduced shutter speeds. While this filter's density can be applied to bright skies, the remaining regions of the image are exposed with a progressively decreasing effect.

This filter is constructed using ColorCore technology, a process that involves laminating the filter substrate between two pieces of optical glass, grinding flat to a tolerance of 1/10,000th of an inch, then mounting to precision metal rings.

1.2 Optical Density    4mm-Thick, Optical Glass Construction    ColorCore Technology    Graduated Effect over Entire Image    Edge-to-Edge Exposure Reduction    No Line of Transition    Reduce Shutter Speeds, Widen Apertures    Padded Pouch

• Compatible with filter holders that can accommodate 4mm-thick, 6.6 x 6.6" rectangular filters
• Densest across one edge, which corresponds to a reduction of light entering a lens by 4 stops and tapers to clear at the opposite edge
• darkens bright areas of an image, such as skies, while the remaining regions of the image are exposed with a progressively decreasing effect
• Maximum 1.2 density corresponds to a 16x filter factor and 4-stop exposure reduction
• Constructed from optical glass for clarity
• Noncoated
• Padded pouch included for storage and transport

Related Questions and Answers

Q: 1. How does this compare to the wide angle low profile filter that is about $40 cheaper? Which one is recommended for videography/filmmaking?

A: The wide angle version is meant for wide angle lenses to prevent vignetting. Otherwise, both versions have the same purpose in mind.

Q: 2. I'm looking for a 62mm polarizing filter for a 18-250 zoom I recently bought at B & H, on top of wanting a decent one I want one with a solid lens cap, I will be leaving this on the lens allot and a good filter is not much use if it is dirty or scratched. I previously bought B+W that had a useless plastic cap that would not stay on. Will the sigma lens cap attach to this or does it come with a decent one?

A: The Tiffen 62mm Digital HT (High Transmission) Circular Polarizing Multi-Coated Filter is front threaded at 62mm's so you will be able to use the Sigma lens cap as designed.

Q: 3. Does this fit on a Canon RF 24-105mm L lens? Without touching the glass?

A: Yes it fits on any lens that has a 77mm filter thread such as the Canon RF 24-105mm f4 L lens.

Q: 4. What’s the transmission value of this filter? Thanks

A: Filter Factor 2.3x (1.2-Stop) to 2.8x (1.5-Stop)

Q: 5. Will a lens cap fit over this filter? And is it waterproof?

A: The filter will accept a 58mm lens cap. This filter is not waterproof.

Q: 6. I do not see a high transmission ultra-slim or low profile version of this filter. Will this polarizing filter cause vignetting with wide angle lenses?

A: when using wide angle lens we highly suggest using filter with slim profiles to avoid vignetting.

Q: 7. What is the Low Profile Titanium Lock Ring? Is this a way of locking the filter, to stop it rotating?

A: The lock ring holds the glass in the main filter ring. It is low profile to avoid vignetting. This has nothing to do with the rotation of the filter for polarization.

Q: 8. Looking for a 77mm lens filters for my new nikon 70-200 f2.8. I'll be using in Iceland in winter when it might be gray overcast with lots of white snow? any suggestsion? on d750 camera

A: We recommend this circular polarizing filter, which will help you to eliminate any reflected light when shooting around water. It will also make blue skies pop and white clouds pop if you happen to encounter those conditions. We also recommend a protection filter such as a href= https://www.bhphotovideo.com/c/product/533244-REG/Tiffen_77HTDUC_77mm_Digital_HT_High.html target= _blank https://www.bhphotovideo.com/c/product/533244-REG/Tiffen_77HTDUC_77mm_Digital_HT_High.html/a

Q: 9. Will this filter work with both a 58mm tele lens and 18mm wide lens?

A: This filters can work with any lens that has a 67mm front thread. However, you may experience vignetting on wider lenses.

Q: 10. Do these Tiffen lenses work with Canon eos 7d?

A: This filter will work on any 77mm thread lens.