Ideal for solar photography, this 6.6 x 6.6" Formatt Hitech Firecrest Ultra Cinema ND Filter 7-Stopfrom Formatt Hitech Firecrest Ultra Cinema ND Filter 7-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    2.1 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. 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: 2. Thin enough to fit in the rear filter holder of the Tamron 15-30mm 2.8 G2 for Canon?

A: Yes.

Q: 3. The picture shows the filter with the front and rear Defender Case. Does the Defender case come with this filter?

A: Yes, the PolarPro Helix Variable Neutral Density Filter comes with the filters shown in the picture.

Q: 4. 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: 5. 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: 6. Many variable neutral density filters either cause a color shift at darker settings or the dreaded "X-effect" on wide angle lenses. Does this filter suffer from those issues?

A: Any variable ND over 6-7 stops can create the X-effect. And that is the deign and physics of a variable ND filter. And it depends on the lens you are using and the light you are shooting under. As for the color shift almost all have some color shift including the Urth ND2-400 (1-8.6 Stop) Variable ND Lens Filter (77mm). These are higher models of filters, https://bhpho.to/3TSB4JH

Q: 7. How thin are these Wratten 2 filters compared to the original Eastman Kodak Wrattens?

A: This Kodak 3 x 3" Neutral Density (ND) #96 2.0 Optical Gelatin Wratten 2 Filter is very accurate, and more durable than the original Eastmen Kodak Wrattens.

Q: 8. If proper care is taken, I'm just curious as to the longevity/ quality of these filters? Will they last more than 6 months? Many years?

A: In our experience the main danger to longevity is water or solvent damage. The other issue would be if they become scratched. In a good clean environment I would expect you to get several years use.

Q: 9. What Filter Thickness is? 2 or 4 mm?

A: The Schneider 4 x 5.65" RHOdium Full Spectrum Neutral Density filters are 4mm thick.

Q: 10. Does it have hard stops?

A: The Urth ND2-400 (1-8.6 Stop) Variable ND Lens Filter (82mm) features smooth twist adjustments rather than hard stops for each stop. This allows for seamless and precise control over the amount of light reduction. The filter can be easily adjusted to achieve the desired exposure without any abrupt changes or limitations.