The 5 x 5" Formatt Hitech Firecrest ND Filter is a solid neutral density filter providing a 8-stop reduction in exposure. This 2.4 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.

Sandwiched between layers of SCHOTT Superwite glass is a 15-layer Firecrest multicoating, which helps to minimize reflections and flare in order maintain truer colors and contrast. Since the coating is located within the middle of the filter, it is less prone to scratching or damage and results in a more durable and hydrophobic design. This filter measures 5 x 5" / 127 x 127mm and is 4mm thick.

2.4 Optical Density    Sandwiched 15-Layer Multicoating    Hydrophobic and Scratch Resistant    4mm Thick SCHOTT Superwite Glass    Increase Exposure Length    Greater Control Over Exposures    Neutral Results Across All Spectrums

ND 2.4 filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required.

Providing a 8-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 filter glass by way of a vacuum-formed, hard-coated, electrolytic process. The multicoating is sandwiched between layers of glass for added water and scratch resistant.

Schott Superwite glass promotes maintained image clarity and its 4mm thick design is well suited to use in matte boxes.

Related Questions and Answers

Q: 1. Is there a front and back to this FirecrestUltra filter? Which side to install the gasket on? I intend to use it with LEE filter holder. The filter's two sides have a different color sheen when you looking at it under an angle.. side with writing has a hint of reddish/ black color reflection, and side without writing has black / bluish reflection. What is recommended filter orientation while using in the filter holder.. does it make any difference if either side is facing away from the lens? Format-Hitech FirecrestUltra100x1003.0

A: FYI! This is the Information from Format-Hitech.USA The colors you see are due to light passing through the filter. These are not directional but it is always good to put the engraved writing on the filter facing away from the camera for identification when in the holder as well as on the chance that another type of filter is directional.

Q: 2. Will these work on the lee holder system??

A: Yes you could use these with a 100mm Lee holder https://bhpho.to/2QqpVki.

Q: 3. 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: 4. Does this filter fit Cokin P holder?

A: Yes, you'll need the adapter ring for the P holder, but it does work with either the Formatt-Hitech or Cokin P Filter Holders.

Q: 5. What is the weight of this filter?

A: I dont know.

Q: 6. Does it have a gasket like the big stopper?

A: No.

Q: 7. 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: 8. Purchased FirecrestUltra 100x100mm ND 3.0 filter. It came with some self sticking foam gasket in separate bag. There are no instructions how to install the gasket.Question: which side of the filter should the gasket be installed on? One side of the filter has writing on.

A: Put the gasket on the side that does NOT have the writing.

Q: 9. How's the vignetting when shooting wide open? Do you have to crop any?

A: I use the the filter ONLY on my Canon 24mm TS-E... and I have not had any issues on any of my images from using this filter. As the old saying goes... you get what you pay for... so, if you're using sub-par glass using an expensive filter, EXPECT sub-par results... no matter the type of filter you use!

Q: 10. 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.