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37mm adjustable ND CPL filter with phone clip

37mm CPL ND 2-400 Adjustable Density Camera Filter

SKU CH-X4TH-8CW32

Adjustable ND2-400 filter with CPL cuts glare and enables slow shutter speeds on 37 mm phone lenses

  • Size37 mm
  • Enables slow shutter speeds in bright light with adjustable ND2-400 density
  • Cuts reflections from non-metallic surfaces while boosting contrast and colour saturation
  • Stepless 1-to-9 outer ring gives precise light control without fixed steps
  • 37 mm thread fits compatible lenses and the included phone clip
  • Combines circular polariser and variable neutral density in one filter

37 mm CPL and Variable ND Filter

This 37 mm filter combines a circular polariser with an adjustable neutral density range from ND2 to ND 400. It is designed for smartphone photographers who want to control exposure and cut glare without carrying multiple glass filters.

Universal clip mount for everyday phone use

The included spring clip grips most iPhone and Android handsets, aligning the 37 mm thread over the built-in lens. Rotating the outer ring varies density steplessly across nine stops, while the CPL layer removes reflections from water, glass and foliage to boost colour saturation.

Replaces separate ND and polariser filters

One unit covers the work of a fixed ND set and a standalone CPL, saving space in a mobile kit. The step-less range is worth it when you shoot video or long exposures in bright daylight and need precise density tuning on the fly.

How it compares

Measured against everything we stock in Lens Filters & Polarizers, at today’s prices. Recalculated every night.

Price $24.99
Cheaper than about 75% of the 1,281 comparable items (median $48.99).

Specifications

Size & build
Size37 mm

Questions about this item

How does the adjustable ND 2-400 range affect exposure control in bright light?

The variable density lets you dial in 1 to 9 stops of light reduction, enabling slow shutter speeds even under strong sunlight.

What physical clearance does the 37 mm filter with its rotating outer ring require?

The filter threads onto a 37 mm lens or the supplied phone clip, and the front ring rotates freely to change density.

How do you attach this filter to a smartphone that lacks filter threads?

Use the included universal phone clip to clamp the 37 mm filter over the phone's camera lens, then rotate the outer ring to adjust density.

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