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Rectangular 150 by 170 millimetre reverse-graduated neutral density filter, clear glass with darkened centre band

Lee Filters

Lee Filters SW150 150x170mm Reverse-Graduated ND 0.9 Filter

SKU CH-ME1Q-GND9M

A 150x170mm reverse-graduated neutral density filter with .9 density for balanced sunrise and sunset exposures on wide-angle lenses

  • Balances bright horizons with a reverse-graduated design for natural exposure
  • Reduces light by three stops (0.9 density) for wider apertures or slower shutters
  • Smooth transition from dyed to clear areas eliminates harsh horizon lines
  • Non-coated glass preserves natural colour rendition without tint shifts
  • Hand-manufactured at the Andover factory for precision quality control

Precision exposure control for landscape

The Lee Filters SW150 150x170mm Reverse-Graduated ND 0.9 Filter is a hand-manufactured camera filter designed for precise exposure control during sunrise and sunset. Its 0.9 density reduces light by three stops, allowing wider apertures or slower shutter speeds in bright conditions. The filter is non-coated for natural colour rendition and compatible with lenses of 24mm or wider on a full frame DSLR.

Upgrading from standard graduated filters

Standard graduated neutral density filters place their darkest area at the top, which can over-darken the sky above the horizon. This reverse-graduated design places the strongest density in the centre, transitioning smoothly toward the edges to match the brightest part of a sunrise or sunset. The jump is worth it when the horizon line is the brightest element in the frame, such as seascapes or open plains.

Three stops of density balanced across a 150

The 0.9 density comfortably handles bright golden-hour light, letting you keep detail in the sky without underexposing the foreground. The smooth transition prevents a harsh stripe at the horizon, delivering a balanced image across the frame. It runs out when the dynamic range exceeds three stops or when using lenses wider than 24mm on full frame, where the transition zone may become visible.

Highlights

  • Balances bright horizons with a reverse-graduated design for natural exposure
  • Reduces light by three stops (0.9 density) for wider apertures or slower shutters
  • Smooth transition from dyed to clear areas eliminates harsh horizon lines
  • Non-coated glass preserves natural colour rendition without tint shifts
  • Hand-manufactured at the Andover factory for precision quality control

Specifications

No published specifications for this item yet.

Questions about this item

What holder system accepts the 150x170mm filter dimensions?

The filter fits the Lee Filters SW150 holder system, which is built for 150mm wide rectangular filters.

How do I orient the reverse-graduated density when mounting it in the holder?

Position the filter so the darker central band sits at the horizon line; the density then fades toward the top and bottom edges.

Will the non-coated glass need recoating or special cleaning over time?

The glass is intentionally non-coated for neutral colour; clean with a microfibre cloth and lens fluid — no recoating is required.

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