NiSi Cine Filter Nano IR GND Hard 4x5.65"""" 0.9

NiSi Cine Filter Nano IR GND Hard 4x5.65" 0.9 – Hard-edge graduated ND for clearly defined horizons

This NiSi Cine Nano IR GND Hard filter darkens specific areas of a frame — typically bright skies — while leaving the rest of the image unaffected. The filter is densest at one edge and transitions sharply to clear toward the centre, making it suitable where the separation between bright and dark areas is well defined.

How it works

The filter features a hard edge: the density drops quickly from dark to clear across a narrow transition line. Because of this sharp transition, you can control exposure on distinct boundaries such as the horizon or the line between sea level and sky. NiSi designed this filter with digital sensors in mind and optimized its attenuation across visible and infrared wavelengths to avoid unwanted color shifts.

Key features

• Constructed from optical glass to deliver clarity and faithful colour reproduction.
• Graduated neutral density design that darkens bright areas of an image, for example skies, while leaving the remainder of the frame unaffected.
• Hard-edged transition line between dense and clear areas, ideal for scenes with a defined separation of tones.
• The filter does not affect the coloration of the image and is therefore well suited for use together with other filters.
• Each surface includes one layer of NiSi Optical Nano Coating that attenuates infrared light as well as visible wavelengths to maintain colour neutrality and suppress colour casts during longer exposures.
• Manufactured from optical glass for clarity and consistent colour fidelity across the frame.
• Scratch resistance for better durability during handling and transport.
• The filter has a 4 mm thickness, which offers a robust physical profile.
• Includes a leatherette pouch for convenient storage and safe transport of the filter.

Specifications

Use cases and practical notes

Use this hard-edge GND when the scene has a clear and straight separation between bright and dark regions, such as a horizon line or the boundary between sea and sky. Because the filter maintains neutral colour balance and reduces IR contamination, it works well with digital camera sensors and alongside other filters without introducing unwanted colour casts.

FAQ

Question: When should I choose a hard-edge GND like this one?
Answer: Choose the NiSi Nano IR GND Hard when the transition between bright and dark areas is distinct and linear — for example, a flat horizon or sea-to-sky separation — because the sharp transition line preserves natural exposure on each side.

Question: Will this filter change the colours in my image?
Answer: No. The NiSi Nano IR GND Hard is formulated to avoid affecting image coloration. Its neutral density characteristics and NiSi Optical Nano Coating help maintain colour neutrality across visible and infrared wavelengths.

Question: Is this filter suitable for digital sensors and long exposures?
Answer: Yes. The filter is optimised for digital sensors and the nano coating attenuates infrared as well as visible light, which reduces colour casts that can appear with longer exposures on digital cameras.

Question: What comes with the filter for storage and transport?
Answer: The filter includes a leatherette pouch to protect it during storage and transport and the construction includes scratch resistance for added durability.