Ideal for solar photography, this 6.6 x 6.6" Formatt Hitech Firecrest Ultra Cinema ND Filter 6.6x6.6" 1-Stopfrom Formatt Hitech Firecrest Ultra Cinema ND Filter 6.6x6.6" 1-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    0.3 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. What are the filter and stop factors for this filter?

A: The filter factor is 3 and the stop loss is 1 and 2/3 stop

Q: 2. Is this a single coated or non-coated filter?

A: The filter is single coated.

Q: 3. The specs say 101.6 x 101.6 mm. Will these fit in a 100mm filter holder?

A: Yes, these will fit in a 100mm filter holder.

Q: 4. Does the variable ND drop in filter fit in the Canon ef -R 0.71 speed booster?

A: No, the Canon Mount Adapter EF-EOS R 0.71x (seen here: https://bhpho.to/3OmrCw5) does not accept the Canon Drop-in Variable ND Filter A.

Q: 5. Does this filter have front threads that will accept a screw-on lens hood?

A: Yes, it does. I use it with a lens hood often.

Q: 6. 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: 7. 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: 8. 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: 9. 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: 10. Is this filter recommended for digital cameras as well, like the Lumix FZ200?

A: Yes, the Tiffen 52mm Digital HT (High Transmission) Circular Polarizing Multi-Coated Filter is compatible with the Panasonic Lumix DMC-FZ200 Digital Camera and would fit onto the 52mm filter threads on the front of the lens, and would be recommended for usage to reduce or eliminate glare and reflections from non-metallic items and (depending on your position and the position of the sun) can also darken/deepen the blue in the sky on blue sunny days. By removing glare, it would also slightly increase teh color saturation and contrast of your image.