NiSi Square Nano IRGND Medium 100x150mm ND16 1.2

NiSi Square Nano IR GND Medium 100x150mm ND16 1.2 – Medium graduated ND to control bright skies

The NiSi Nano IR Medium Graduated Neutral Density (GND) filter in 100x150 mm format helps you darken bright areas of a scene while keeping other regions at a normal exposure. Photographers commonly use this rectangular filter to reduce overexposed skies and preserve detail in landscapes that include buildings, mountains or other elements that extend into the skyline.

Designed for landscape photographers and skyline scenes

This filter targets scenes where a dominant bright sky would otherwise overpower foreground elements. It works well when buildings, mountain peaks or other small structures protrude into the skyline, because the medium-edged transition balances the exposure between sky and land without a sudden line.

Glass construction and coatings

The filter is made from high-quality optical glass (not resin), specifically Environmental Optical Lens glass (H-K9L). NiSi applies a nano coating to both sides to preserve detail and to reduce reflections. In addition, the filter includes an infrared (IR) protection coating to reduce unwanted red color casts that can appear when shooting at small apertures.

How it performs and how to use it

Unlike filters that alter color balance, neutral density filters do not affect the coloration of the image. Furthermore, you can reposition the filter in its holder to recompose your frame and place the graduated transition exactly where you need it. The graduated dark area sits at the top of the filter and gradually clears toward the bottom, preventing sky overexposure while keeping the foreground exposure normal.

Availability and density options

The NiSi Nano IR Medium GND in the 100x150 mm size is available in multiple density steps to match different lighting conditions. The available maximum effects are 2-stop, 3-stop and 4-stop variants. This specific product listing is the ND16 (1.2) option, corresponding to the 4-stop variant.

• Ultra Low Color Cast, Ultra Low Reflection – The coatings and glass construction minimise color shifts and reflections to keep images accurate.
• No Vignetting – The filter is designed to avoid darkening at the corners when used on compatible systems and formats.
• High Definition – The optical glass preserves fine detail to maintain image sharpness across the frame.
• Nano Coating on Both Sides, Water & Oil Repellent – The nano coating repels water and oil and helps keep the surface clean for consistent performance.
• Environmental Optical Lens glass (H-K9L) – The filter glass specification used by NiSi for optical quality.

FAQ

Question: When should I use a Medium GND instead of a hard or soft GND?
Answer: Use a Medium GND when you need a gradual transition between bright sky and darker foreground, especially where buildings or mountain peaks protrude into the skyline. The medium-edged line reduces the risk of an obvious transition line while still darkening the sky effectively.

Question: Will this filter change my colors or image contrast?
Answer: Neutral density filters are designed not to affect overall coloration. The NiSi Nano IR GND additionally includes coatings to minimise color cast and reflections, and an IR protection layer to reduce infrared-induced red casts at small apertures.

Question: Can I move the graduated line to match my composition?
Answer: Yes. The filter can be repositioned in its holder so you can move the graduated transition up or down to match the horizon or any element intersecting the skyline.

Question: Why is the IR protection coating important?
Answer: When shooting at small apertures, infrared light can introduce a red color cast in photos. The IR protection coating reduces that infrared light passing through the lens and helps restore natural color rendition.

Question: What density options are available for this filter size?
Answer: For the 100x150 mm size, NiSi offers the Medium GND in 2-stop, 3-stop and 4-stop densities. This specific listing is the ND16 (1.2) 4-stop model.