This 4 x 4" Firecrest Ultra Cinema ND Filter Kit 2 from Formatt Hitech includes ND 1.2, 1.5, and 1.8 filters, which offer 4-, 5-, and 6-stop exposure reduction, respectively. These filters use a rare earth mineral coating to result in extremely neutral NDs. They feature 4mm thick Schott Superwite glass, and the multi-coating is bonded in the middle to increase scratch resistance. Firecrest filters are neutral across all spectrums, including UV, visible, and infrared.

Rectangular ND Filters for Matte Boxes    1.2, 1.5, and 1.8 Optical Density    4, 5, and 6-Stop Exposure Reduction    Rare Earth Metal IRND Coating    4mm Thick Schott Superwite Glass

Related Questions and Answers

Q: 1. May i know what is the full diameter of the filter for 67mm, 72mm, 77mm, and 82mm?

A: Sorry I can't measure precisely but the system is no larger than standard filters. The diameter is about 2mm larger than the thread size and flush with the lens barrel. The magnetic system is built in to the rim of the filters so it does not take additional space.

Q: 2. Hi Wanted to know Does it work to look at Sun . To check sun position?

A: No, it's not safe to use a 6 stop ND filter like the NiSi Cinema Variable ND Viewing Filter with Lanyard to directly view the sun, as ND filters are not made for a human eye, and would not protect your eyes properly from the sun's UV rays.

Q: 3. Does anyone know if the ND filters can be stacked (on top or below) the wide angle accessory lens?

A: The filters in the DJI ND Filter Kit for Mini 4 Pro (3-Pack) are not able to be stacked with the DJI Wide-Angle Lens for Mini 4 Pro.

Q: 4. will this adapter ring work with the lee 100mm system?

A: Yes, this adapter is designed for the LEE 100mm system.

Q: 5. How do we adapt this 86/95mm set to most of my smaller lenses? Does Nisi make an adapter for a 62mm filter to fit the 95mm nd?

A: The Ice Magnetic Step Up Ring Filter Adapter (62-95mm), B&H # ICMSUR6295, would be the correct step-up ring adapter that would allow you to connect the NiSi Swift FS ND Filter Kit with ND8, ND64, and ND1000 for 86mm and 95mm Filter Threads to a lens that has 62mm front filter threads. https://bhpho.to/3ibpmZT

Q: 6. What size would you recommend for the Nikkor Z 14-30mm f4 lens to use 2 filters stacked without vignetting?

A: The NiSi Swift FS ND Filter Kit (82mm) is not recommended when stacking filters on the Nikon NIKKOR Z 14-30mm f/4 S Lens. Nisi recommends this filter holder, BH #NIS6FHKSFT (https://bhpho.to/3O3Pt3g).

Q: 7. Are these stackable?

A: According to Freewell it is not recommended to stack these as it and cause vignetting. Technically speaking it is possible, not recommended.

Q: 8. Is 67mm Formatt Hitech UV HAZE 2A filter really multi-coated as stated in the Specs?

A: Yes it really is multi coated.

Q: 9. What is the weight in grams of the filter itself (without magnetic lens cover)?

A: The Freewell 82mm All-day Variable ND filter weighs 71 g without the lens cap.

Q: 10. Does the front of the filter has threat to attach a step up ring ? I'm planning to attach a 82-95 step up ring in front of this filter

A: Yes, each of the NiSi filters in this 82mm Circular ND filter kit have 82mm front threads for attaching other rings/filters.