NiSi Square Nano IRGND Medium 150x170mm ND8 0.9

NiSi Square Nano IRGND Medium 150x170mm ND8 0.9 – Medium graduated ND to control bright skies

The NiSi Square Nano IRGND Medium 150x170mm ND8 0.9 is a medium-edge graduated neutral density filter designed to darken bright areas of a scene, while keeping the rest of the exposure normal. Photographers use it to reduce overexposed skies without affecting foreground detail, especially when buildings, mountains or other elements extend into the skyline.

Designed for landscape photographers

This filter is specially designed for landscape photography. It places a darker area at the top of the filter that gradually transitions to clear at the bottom. As a result, you can preserve detail in bright skies while maintaining normal exposure for the rest of the frame. You can also reposition the filter in a holder to recompose the scene and find the best placement for the graduated transition.

Optical quality and coatings

The filter is made from high-quality optical glass (not resin), identified as Environmental Optical Lens glass (H-K9L). NiSi applies a nano coating on both sides to protect image detail and to reduce reflections. The nano coating also provides water and oil repellency, making the filter easier to clean and maintain in the field.

Infrared protection and color neutrality

Neutral density filters normally do not affect image coloration. However, camera sensors can be vulnerable to infrared light, which may introduce a red cast when shooting at small apertures. NiSi added an infrared protection coating layer to this filter to reduce infrared contamination and help preserve natural colors.

Key characteristics

• Medium-edged graduated neutral density filter that prevents sky overexposure
• Made from high-quality optical glass (not resin)
• Nano coating on both sides with water and oil repellent properties
• Infrared protection coating to reduce IR-caused color shifts
• Ultra low color cast and ultra low reflection
• No vignetting and high definition image quality
• Repositionable in a filter holder for flexible composition

Available densities

The Nano IR Medium Graduated Neutral Density filter in size 150x170 mm is available in three density options with maximum effect: 2 stop, 3 stop and 4 stop. The ND8 0.9 version corresponds to the 3-stop option.

Typical use cases

1. Landscape scenes with bright skies and darker foregrounds, where you need to preserve detail in the sky without underexposing the foreground.
2. Compositions that include buildings, mountain peaks or other elements intruding into the skyline, where a medium transition line provides a natural-looking balance.
3. Fieldwork where water and oil repellency and easy cleaning are beneficial, such as coastal or humid environments.

FAQ

Question: Is this filter suitable for landscape photography?
Answer: Yes. The NiSi Square Nano IRGND Medium 150x170mm is specially designed for landscape photographers and helps to control bright skies while preserving foreground exposure.

Question: What does the infrared protection do?
Answer: The infrared protection coating reduces infrared light reaching the sensor, which helps prevent the red color cast that can occur at small apertures and preserves natural colors.

Question: Can I reposition the filter in the holder?
Answer: Yes. The filter can be repositioned in a compatible holder, allowing you to move the graduated transition to suit different compositions.

Question: Is the filter made of glass or resin?
Answer: The filter is made from high-quality optical glass (Environmental Optical Lens glass H-K9L), not resin.

Question: Which stop options are available for this filter size?
Answer: In the 150x170 mm size, the Nano IR Medium graduated ND is available in 2 stop, 3 stop and 4 stop options. The ND8 0.9 corresponds to the 3-stop version.