This 85 x 85mm Formatt Hitech Firecrest ND Filter is a solid neutral density filter providing a 3-stop reduction in exposure. This 0.9 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or longer shutter speed than normally required. By slowing your exposure time or increasing your aperture, you are able to control depth of field and convey movement more easily.

The design of this filter has been optimized for use with digital sensors and promote nearly flat attenuation of visible, UV, and infrared light. Due to imaging sensors' greater susceptibility to infrared light, compared to traditional film, color casts can occur when photographing darker subjects that require increased exposure times. This filter provides a high level of neutrality across all three spectrums in order to eliminate color casts and ensure cleaner, truer blacks.

Applied to the outside of the SCHOTT Superwite glass construction is a 15-layer Firecrest multicoating, which helps to minimize reflections and flare in order maintain truer colors and contrast. The multicoating is also scratch resistant and hydrophobic to benefit the overall durability of the filter. It measures 3.3 x 3.3" / 85 x 85mm and is 0.08" / 2mm-thick, making it compatible with the Formatt Hitech 85mm Filter Holder.

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.

0.9 Optical Density    15-Layer Coating on Outside of Filter    Hydrophobic and Scratch Resistant    2mm-Thick SCHOTT Superwite Glass    Increase Exposure Length    Greater Control Over Exposures    Neutral Results Across All Spectrums    Fits Formatt Hitech 85mm Filter Holder    Includes Pouch

ND 0.9 filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required.

Providing a 3 stop exposure reduction, this filter allows you to control depth of field and convey movement more easily.

Attenuates infrared light, as well as visible and UV wavelengths, to maintain color neutrality and suppress color casts due to increased exposure lengths.

The 15-layer Firecrest coating has been applied directly to the outside of the filter glass by way of a vacuum-formed, hard-coated, electrolytic process. The multicoating is water and scratch resistant for greater overall durability.

SCHOTT Superwite glass promotes maintained image clarity and its 2mm-thick design is compatible with the Formatt Hitech 85mm Filter Holder.

Related Questions and Answers

Q: 1. Will this work with the smallrig Lightweight Matte Box? I see many people saying 100x100mm are incompatible but they say 4x4 inch are... confusing or what??

A: The Formatt Hitech 100 x 100mm Firecrest Ultra ND 0.9 Filter (3-Stop) is incompatible with the SmallRig Lightweight Carbon Fiber Matte Box because the filter trays on the matte box support 4mm thick filters, and the Formatt Hitech filter is 2mm thick.

Q: 2. Does this filter block IR spectrum?

A: It "attenuates" or reduces IR interference during long exposures to prevent color casts. It does not fully block IR.

Q: 3. is this the same as firecrest irnd filter? I have firecrest irnd filter now and is looking for another one.

A: This filter is an IRND filter from the Firecrest Series.

Q: 4. Will these Formatt 46mm Firecrest Ultras fit the Z800 mm as screw in filters?

A: The Nikon 52mm Circular Polarizer (C-PL3L) Glass Filter compatible with the Nikon NIKKOR Z 800mm f/6.3 VR S Lens does not allow the 46 mm polarizing filter to come off and to be changed with another filter so this Formatt Hitech 46mm Firecrest Ultra ND 0.9 Filter can't be used.

Q: 5. Does this filter have front filter threads to stack another filter?

A: yes there is a thread on front to stack more filters

Q: 6. I have both ND 1.8 and 3.0. I found they are so different in coating. Both sides of ND 3.0 are the same. Surface of ND 3.0 like a blue mirror. I can see myself clearly in it. One side of ND 1.8 like a normal mirror with very low reflection. Another side of ND 1.8 have variant color looked in different direction. Both NDs are purchased in B&H. The 1.8 one is used. I'm not sure whether they are all right. Can you confirm this? Thank you.

A: I have both ND 1.8 and 0.9. Both sides of ND 1.8 and 0.9 are the sameSurface of ND 1.8 and 0.9 like a blue

Q: 7. By the picture, this filter looks like it is graduated. Is it in fact built with a graduation in it?

A: Hi! No, this is not a grad ND filter. It must simply be the marketing photograph. I assure you that this is a solid ND filter.

Q: 8. The photo looks like it is a graduated filter. Is this is a straight filter?

A: Image is misleading. It is not a graduated filter. It is a solid variable density filter.

Q: 9. Are the filters stackable?

A: It is stackable. It does have 77 mm front filter thread.

Q: 10. Does this filter fit Cokin P holder?

A: Yes, it will fit either the Formatt Hitech or Cokin P Series filter holder.