This 4-stop, 85 x 90mm Formatt Hitech Onyx ND Filter 85x90mm 4-Stopfrom Formatt Hitech Onyx ND Filter 85x90mm 4-Stopfeatures toughened mineral glass, which makes it highly resistant to drop and impact damage. Multi-coated, the filter is anti-reflective, waterproof, and resistant to common elements.

1.2 Optical Density    Multi-Coated    Toughened Mineral Glass    Anti-Reflective    Waterproof

Related Questions and Answers

Q: 1. can you add another B&W filter on top of this one?

A: Yes, although depending on your focal length you will start to see vignetting and potentially the edge of the filter in the corners of the frame. This will be especially true at wider angles and with more filters stacked.

Q: 2. hi half the comments say it does X half don't - so which is it ? Yes or No ??

A: Typically most variable nd filters have an x effect and or a color bias when used at the full nd setting. As a rule of thumb, you should stop short of the max and maybe go to about 2 stops lower than the max of the filter. For example if a variable nd filter goes to 10 stops, it would be advisable to shot at 8 stops or below.

Q: 3. How big is the actual filter? Will this drop in to the 52 mm filter slots at the back of Canon telephoto lenses?

A: I don't have the actual dimensions but the filter is permanently mounted in the holder and it will only fit into the canon drop in filter mount adapter. See BH #CAMAEFRFDIND.

Q: 4. Does this have hard stops?

A: Hello Michael, The Variable ND Filter does not have hard stops. The nature of this type of filter will not have incremental hard stops, and the MIN and MAX marks on the rings are used as a guide.

Q: 5. Does this have hard stops or does it spin indefinitely?

A: This filter does not rotate, it is a 6 stop nd filter only and not a variable nd.

Q: 6. What is a recommended storage case for the filter when not in the adapter?

A: A Domke 11x11" Color Coded Protective Wrap (Gray), B H # DOPW11G would be a suitable option to store this filter. https://bhpho.to/3t8GR0O

Q: 7. I have Nikon 16-35mm len. I heard someone indicated that this len may cause flare. Can I attach my 77mm len hood to my wide-angle len first and then attach this ND len on the wide-angle len???

A: Not really. The Eclipse should be attached to the Wide Angle lens and then attach the Fader Hood. The hood should reduce the chance of flare.

Q: 8. Will this work with the Canon EF 800mm f/5.6 L IS USM lens?

A: Unfortunately the Canon Drop-In Variable ND Filter A (1.5-9 Stop) is not compatible with the 800mm lens. Currently there are no variable ND filter options for the 800mm RF f5.6 lens. You can use a solid ND 52mm using the holder that comes with the 800mm lens.

Q: 9. Are Minimal = 2 stops and Max = 8 stops? How do I read the marks on the ring to know 2/4/8 stops?

A: When I am using the Eclipse I never worry about what stop I am using. What difference does it make? All I am interested in doing is getting it dark enough to be able to slow down my shutter speed so that I can get the effect I want. I never have to change filters if the 2 stop or 6 stop isn't enough, I just rotate the filter. Don't think about what number it is just use the the darkness you need. Hope this helps.

Q: 10. Up to how many stops can it provide?

A: The headline and specs both say 1.5 to 9 stops.