NiSi Square Nano IRGND Medium 100x150mm ND4 0.6

NiSi Square Nano IR GND Medium 100x150mm ND4 0.6 – Medium Graduated Neutral Density for Sky and Skyline Control

The NiSi Nano IR Medium Graduated Neutral Density (GND) filter in 100x150 mm helps you darken specific parts of a scene, most commonly bright skies, while keeping other areas at a normal exposure. It suits landscape photographers who need controlled transitions between bright and dark areas, especially where buildings, mountains or other elements meet the skyline.

What this filter does

This rectangular Medium GND places a darker area at the top that transitions gradually to clear at the bottom. As a result, it prevents overexposure of skies while leaving foreground elements unaffected. You can reposition the filter in a holder, which allows you to recompose and align the graduated transition for the best possible framing.

Key design and optical features

• High-quality optical glass (not resin) — NiSi uses Environmental Optical Lens glass (H-K9L) for image clarity.
• Nano coating on both sides — the coating preserves detail and reduces reflections while repelling water and oil.
• Infrared (IR) protection layer — NiSi added IR protection to reduce unwanted red cast caused by infrared light when shooting at small apertures.
• Medium transition edge — the medium-edged line of transition works well for scenes with buildings, mountains, and other elements that protrude into the skyline.
• Neutral density effect without color shift — neutral density filters do not affect the coloration of the image, maintaining natural tones.
• Repositionable — you can shift the filter within a holder to fine-tune composition and transition placement.

Available strengths in the Nano IR Medium GND series

The NiSi Nano IR Medium Graduated Neutral Density filters in 100x150 mm are available in multiple aperture step strengths. This listing is for the ND4 0.6 variant. The series also includes other strengths for different exposure control needs.

Benefits at a glance

• Ultra low color cast and ultra low reflection to preserve natural image tones.
• No vignetting when used appropriately in compatible holders and systems.
• High definition optical performance for landscape and architectural work.
• Water and oil repellent surfaces for easier cleaning and field use.

Smart FAQ

Question: Will this Medium GND affect the color of my images?
Answer: No. The NiSi Nano IR Medium Graduated Neutral Density filter is a neutral density filter designed not to affect image coloration. Additionally, the nano coatings and IR protection layer help preserve natural colors.

Question: Can I adjust the graduated transition after mounting the filter?
Answer: Yes. The filter is rectangular and designed to be repositioned inside a holder, allowing you to move the dark-to-clear transition up or down to match the horizon or other compositional needs.

Question: Why is IR protection important for this filter?
Answer: When using neutral density filters, the camera can become vulnerable to infrared light, which may introduce an unwanted red cast at small apertures. NiSi added an IR protection coating to reduce infrared transmission and help retain natural colors.

Question: For which scenes is the medium transition most suitable?
Answer: The medium-edged transition is particularly useful for scenes that include buildings, mountains, or other elements protruding into the skyline where a gradual darkening of the sky produces a balanced exposure.