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A silver 77mm variable ND lens filter with knurled rim and protective travel tin

Urth

Urth 77mm ND2-400 Variable ND Lens Filter 1-8.6 Stop UNDX400ST77

SKU CH-05KE-N1C0F

A 77 mm variable neutral-density filter adjustable from 1 to 8.66 stops, with a locking rim and 8-layer nano-coated Japanese AGC glass in a slim magnalium frame.

  • TypeDigital Camera Accessory Kits
  • Adjustable 1 to 8.66 f-stops for flexible exposure control
  • Min-max locking rim prevents over-rotation and X-effect
  • 8-layer nano-coated Japanese AGC glass ensures high light transmission
  • Ultra-slim rim design optimises optics and prevents vignetting
  • Durable magnalium construction backed by lifetime quality assurance

Versatile ND Filter for Creative Control

The Urth 77mm ND2-400 Variable ND Lens Filter adjusts from 1 to 8.66 f-stops, letting photographers manage bright, changing light with a single filter. It suits nature and landscape shooters who want shallow depth of field or motion blur without swapping fixed ND filters. Cinematographers gain consistent exposure control for cinematic looks in variable outdoor conditions.

Slim 77mm Thread with Locking Rim

The 77mm thread mounts directly on matching lenses, while the ultra-slim rim prevents vignetting on wide-angle glass. A built-in min-max locking mechanism stops over-rotation and eliminates the X-effect at maximum density. The package includes a protective travel tin, a recycled cleaning cloth, and plastic-free packaging so the filter stays clean and ready in the field.

Durable Magnalium Build for Sustained Use

The filter frame is crafted from tough magnalium alloy designed to withstand repeated adjustment and outdoor handling. Eight-layer nano-coated Japanese AGC glass maintains high light transmission and resists flare during long exposures. Lifetime backing reflects confidence that the materials and coatings will not degrade under continuous, heavy use.

Highlights

  • Adjustable 1 to 8.66 f-stops for flexible exposure control
  • Min-max locking rim prevents over-rotation and X-effect
  • 8-layer nano-coated Japanese AGC glass ensures high light transmission
  • Ultra-slim rim design optimises optics and prevents vignetting
  • Durable magnalium construction backed by lifetime quality assurance

Specifications

BrandUrth
ModelUNDX400ST77
TypeDigital Camera Accessory Kits

Questions about this item

How many f-stops can the Urth 77mm Variable ND Filter block at its maximum setting?

The filter blocks up to 8.66 f-stops of light at its maximum density, allowing wide apertures or slow shutter speeds in bright conditions.

Does the locking rim prevent the cross-pattern artefact when rotating the filter to its limits?

Yes, the min-max locking mechanism stops over-rotation, eliminating the X-effect that can appear at extreme settings.

What thread size must my lens have to attach this filter directly?

Your lens needs a 77mm front filter thread to mount this filter without an adapter ring.

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