NiSi Square Nano IRGND Hard 180x210mm GND8 0.9

NiSi Square Nano IR GND Hard 180x210mm – Hard Graduated ND for clearly defined horizons (GND8 / 0.9)

The NiSi Nano IR Hard Graduated Neutral Density (GND) filter in 180x210 mm format provides a clearly defined transition between bright and dark areas. It suits landscape photographers who work with scenes that have a distinct separation—such as the horizon between sea and sky. The filter delivers neutral density without altering image coloration and can be repositioned in a holder to compose your shot precisely.

What this Hard GND does and when to use it

A Hard GND has a very distinct boundary between its dark and transparent sections. Therefore, use this filter when you have a clearly defined separation in your scene—for example, the horizon line at sea or a straight skyline. By placing the dark portion over bright areas like the sky, you can balance exposure while keeping foreground detail intact.

Construction and optical properties

This NiSi filter is made from high-quality optical glass (not resin). Additionally, NiSi applied a nano coating to preserve detail and repel contaminants. The filter also includes an infrared protection coating layer to reduce unwanted infrared light that can create a red color cast when shooting at small apertures.

Repositioning and handling

You can reposition the filter in a compatible holder, allowing you to recompose and fine-tune the placement of the transition line for the best result. This flexibility helps when the horizon or other bright/dark boundaries are not centered or when you change framing.

Key features

• Ultra Low Color Cast, Ultra Low Reflection
• No Vignetting
• High Definition
• Nano Coating on Both Sides, Water & Oil Repellent
• Environmental Optical Lens glass (H-K9L)

Frequently Asked Questions

Question: When should I choose a Hard GND like this one over a soft GND?
Answer: Choose a Hard GND when the boundary between bright and dark areas in your scene is sharply defined—such as a straight horizon at sea. A Hard GND provides a clear transition that aligns with such distinct separations, preventing uneven darkening across the frame.

Question: Will this filter change the colors in my image?
Answer: No. The filter is a neutral density type and does not affect image coloration. Furthermore, the infrared protection coating helps prevent infrared-induced red color casts when shooting at small apertures.

Question: Can I reposition the filter for different compositions?
Answer: Yes. The filter can be placed and shifted in a compatible holder so you can recompose and position the transition precisely over the bright/dark boundary.

Question: Is this filter prone to vignetting or reduced sharpness?
Answer: According to the specifications, the filter is designed to produce no vignetting and to deliver high definition, aided by nano coatings that reduce reflections and preserve detail.