Exhibiting improved clarity, flatness, and reduced reflectivity, the 100 x 150mm Firecrest Ultra Reverse Graduated ND 0.9 Filter from Formatt-Hitech is ideal for photographing sunrises and sunsets due to its unique design where the density of the filter is greatest in the middle and tapers off to the edge. By reversing this direction of the graduated ND, you are able to more accurately control bright horizon lines while retaining exposure in the foreground and sky.

Designed using inspiration from their cine Firecrest filters, these Ultra filters receive an additional lapping and polishing process during production to ensure lower reflectivity and improved clarity and sharpness. This filter has also been optimized for use with digital sensors and promotes 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 multi-coating, which helps to minimize reflections and flare in order to maintain truer colors and contrast. The multi-coating is also scratch-resistant and hydrophobic to benefit the overall durability of the filter. It measures 3.9 x 5.9" / 100 x 150mm and is 2mm-thick, making it compatible with the Formatt-Hitech 100mm Filter Holder.

0.9 Optical Density    15-Layer Coating on Outside of Filter    2mm-Thick Schott Superwite Glass    Hydrophobic and Scratch-Resistant    Reduce Exposure in Selective Areas    Density Transitions from Center to Edge    Secondary Lapping and Polishing Process    Fits Formatt-Hitech 100mm Filter Holder

The Ultra Firecrest series of filters exhibit greater clarity and have lower reflectivity than the original Firecrest filters. Borrowing from the range of Firecrest cine filters, the Ultra series filters undergo a secondary lapping and polishing process after the initial polishing and bonding stage. This additional step helps to ensure flatness and consistency for improved image quality.

Reverse graduated filters place the most density in the middle of the filter to accommodate bright horizons and other situations where the brightest part of the image lies in the middle of the composition.

The 0.9 density provides a 3-stop reduction in light in selective areas.

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 multi-coating is water- and scratch-resistance for greater overall durability.

Schott Superwite glass promotes maintained image clarity and its 2mm-thick design is compatible with the Formatt-Hitech 100mm Filter Holder.

Related Questions and Answers

Q: 1. Is this filter compatible with Lee Filters Foundation Kit (Standard 4x4") B&H # LEFK ?

A: Yes, this filter will fit with the Lee Filter Foundation Kit.

Q: 2. are these IRND?

A: These filters would simply be ND filters. They are not IRND filters. Though, we do carry two Formatt Hitech 150 x 150mm ProStop IRND Three Filter Kits.

Q: 3. Preventing light leaks: Gasket available? Seal built in to holder?

A: you can try this BH #FOFG3P85

Q: 4. Can you fit 6 150x100mm Armour Filters in this Case?

A: According to Kase's website, the Armour filter bag accommodates up to three 150 x 100mm filters plus the Armour filter holder itself.

Q: 5. can I insert a nisi filter into it?

A: Yes you can, as long as its 100x150mm and 2mm thick.

Q: 6. What filter system do you recommend/use with this filter?

A: This is a 100 x 100mm - 2mm thick filter, and one of the most popular systems for that size is the LEE Filters LEE100 Filter Holder (https://bhpho.to/2Tg0TrU)

Q: 7. will it work with the nisi v6 holder?

A: The K&F Concept X-Pro Square ND64 Filter with Frame (100x100) is not compatible with the NiSi V6 Filter Holder. This item is designed for use with the X-Pro Square Filter Holder System.

Q: 8. Does it fits 4"x4" Tilta Mattebox?

A: No, the Haida 100 x 100mm Circular Polarizer Filter will not fit the Tilta Tiltaing Mini Matte Box 4"x4", the Haida 4 x 5.65" V-Pro Series C-POL Polarizing Filter (BH #HAVPCP45) will.

Q: 9. Is this filter compatible with the nisi 100mm v5 system?

A: Yes. The B+W 100 x 100mm XS-Pro MRC-Nano 803 Solid Neutral Density 0.9 Filter (3-Stop), B&H # BW803440, is a 100 x 100mm / 4 x 4 filter that is 2mm thick. The B+W 100 x 100mm XS-Pro MRC-Nano 803 Solid Neutral Density 0.9 Filter (3-Stop) would be compatible for use in the NiSi V5 Pro 100mm Filter Holder Kit.

Q: 10. Can other filters screw on to the Nano filter to stack filters?

A: Unfortunately this filter is too thin to stack any more filters on top of it.