NiSi

NiSi Soft IR GND(32) 1.5 100x150 Graduated Filter

4.6 (4 reviews)
100x150

A 5-stop soft graduated ND filter on premium optical glass for smoothly balancing bright skies and dark foregrounds.

$216.72*
In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The NiSi Soft IR GND(32) 1.5 is a 100x150mm graduated neutral density filter designed for landscape and outdoor photographers who need to balance extreme differences in brightness between sky and foreground. With a 1.5 density rating — equivalent to 5 stops of light reduction — the darkened portion of this filter significantly tames bright skies, sunsets, and reflective clouds, while the clear lower half lets the foreground retain full exposure. The soft graduation means the transition zone is wide and feathered, blending naturally across uneven horizons like mountain ridges, treelines, and cityscapes.

Built from 2mm H-K9L high-definition optical glass, this filter prioritizes sharpness and optical clarity. The double-sided anti-glare coating serves a dual purpose: it minimizes flare and ghosting from stray light, and it helps reduce infrared contamination that can introduce unwanted color shifts during long exposures. The 100x150mm rectangular format slides into standard 100mm filter holder systems, giving photographers the ability to raise or lower the graduation line to match the horizon placement in their composition. For serious landscape work where exposure balance is critical, this filter is a reliable tool that delivers consistent, natural-looking results straight from the camera.

Key Features

2mm H-K9L High Definition Optical Glass

Double Sided Anti-glare Coating

Waterproof and Oil Resistant Nano Coating

Ultra Low Color Cast

Can be used in any 2mm filter system

Specifications

Filter Type
Soft Graduated Neutral Density
Density
1.5 (GND32, 5-stop)
Size
100x150mm
Glass
2mm H-K9L High Definition Optical Glass
Coating
Double-sided Anti-Glare

Pros & Cons

👍 Pros

  • 5-stop reduction is strong enough to handle high-contrast scenes like sunrises and sunsets
  • Soft graduation provides a natural-looking transition that works well with uneven or irregular horizons
  • Made from 2mm H-K9L high-definition optical glass for excellent clarity and minimal distortion
  • Double-sided anti-glare coating reduces flare and maintains color accuracy
  • 100x150mm rectangular format allows vertical adjustment within the holder for precise positioning

👎 Cons

  • 5-stop density may be too strong for mildly bright skies, requiring a lighter GND filter as well
  • Rectangular glass filters are more fragile and require careful handling compared to screw-on filters
  • Requires a separate 100mm filter holder system to use, adding to overall cost
  • The soft graduation may not provide enough contrast control for scenes with a perfectly flat, sharp horizon
  • At 2mm thickness, it may add slight vignetting when stacked with multiple filters on ultra-wide lenses

Frequently Asked Questions

A 1.5 density equals a 5-stop light reduction on the graduated side, which is strong enough to tame very bright skies while leaving the foreground unaffected.
This soft GND filter has a gradual, feathered transition between the dark and clear areas, making it ideal for uneven horizons like mountains or cityscapes. A hard GND has an abrupt transition better suited for flat, clean horizons.
This filter is designed for standard 100mm filter holder systems, such as NiSi's own V5, V6, or V7 holders, as well as compatible third-party 100mm holders.
The double-sided anti-glare coating on the H-K9L glass helps maintain color neutrality and reduces infrared contamination, which can cause unwanted color casts in long exposures.
Yes, most 100mm holder systems support stacking multiple filters, though stacking may increase the risk of vignetting on wide-angle lenses.