Ideal for solar photography, this 6.6 x 6.6" Formatt Hitech Firecrest Ultra Cinema ND Filter 6.6x6.6 4-Stopfrom Formatt Hitech Firecrest Ultra Cinema ND Filter 6.6x6.6 4-Stopuses a rare earth mineral coating to create exceedingly neutral NDs. The filter is made from 4mm thick Schott Superwite glass, with a multicoating that is bonded in the middle to increase scratch resistance. Firecrest filters are neutral across all spectrums, including UV, visible, and infrared.

Firecrest Ultra IRND is a carbon-based filter with hyper-neutral color balance. It can be used for uniform near infrared filtration allowing your camera's color science to remain untouched. The Ultra IRND is equally compatible with ARRI, RED, Blackmagic Design, Canon, Panasonic, and other modern digital cinema cameras. This filter allows the image to be captured as the manufacturer intended.

4mm Cine Firecrest Ultra IRND have the same features as the popular 4mm Cine Firecrest ND. Firecrest Cine filters were renamed in 2019 to match the Ultra photography filters which received a new lap and polish manufacturing technique. For cinema sizes, the 4mm Firecrest ND were always lapped and polished where the 2mm photography versions were not. 4mm Firecrest ND and 4mm Firecrest Ultra IRND both have identical optical performance with the engraving being the only difference.

This filter is designed specifically for photography applications. This filter is not suitable for direct solar viewing with the naked eye, including with optical viewfinders.

For Solar Photography    1.2 Optical Density    Rare Earth Metal IRND Coating    4mm Schott Superwite Glass    Scratch and Water Resistant    Darkens Entire Image    Antireflective Edge Seal    Lap and Polish Manufacturing Technique

Related Questions and Answers

Q: 1. Is this filter coated?

A: According to the manufacturer, the Urth ND2-400 (1-8.6 Stop) Variable ND Lens Filter (58mm) features an 8-layer nano coating.

Q: 2. Is this antireflection-coated?

A: The manufacturer states that this filter has an 8 layer nano coating.

Q: 3. How thin are these? Looking to use them for the rear filter holder of my Tamron 15-30mm 2.6 g2 for Canon

A: These are .1mm thick.

Q: 4. Is this filter just loose Wratten or does it have a cardboard frame or something to make it more rigid in the filter holder?

A: The Kodak 4x4" (100mm) 85N9 Color Conversion Wratten 2 Optical Gel Filter does not come with a cardboard frame to make it more rigid in the holder. The filter will work fine without additional framing.

Q: 5. Does this have the option to not use any ND, while keeping the filter in the adapter to avoid dust seeping into the hole?

A: You will need to add this clear filter to the drop in filter slot in the Canon EF RF filter adapter. This filter will make sure no dust gets in the camera. https://www.bhphotovideo.com/c/product/1434115-REG/canon_3444c001_drop_in_clear_filter_a.html

Q: 6. Does the wheel have stops indicators? Or do we have to guess what stop we are at.

A: The NiSi Cinema True Color 1-5 Stop Variable Neutral Density Filter for C5 Matte Box (1 to 5-Stop) does not have stop indicators.

Q: 7. What is the diameter of the round glass filter in millimeters?

A: The NiSi Cinema True Color 1-5 Stop Variable Neutral Density Filter for C5 Matte Box can be used with 95mm cinema lenses and lenses with filter threads up to 82mm.

Q: 8. 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: 9. 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: 10. Thin enough to fit in the rear filter holder of the Tamron 15-30mm 2.8 G2 for Canon?

A: Yes.