Urth 39mm Variable ND2–400 + ¼ Black Mist Filter (Plus)

Urth 39mm Variable ND2–400 + ¼ Black Mist Filter (Plus) combines adjustable neutral-density control with light diffusion. Its 39mm thread and variable range suit compatible lenses when you want to manage exposure while adding a softened, hazy look.

At a glance

Manufacturer describes a variable neutral-density range of 1–8.66 stops for exposure adjustment in changing light.
The combined filter is described as diffusing light for a stronger haze effect and softened highlights.
A locking min-max rim is intended to prevent over-rotation and the X-effect.
The listing describes SCHOTT B270 glass with a 20-layer CoraNano coating.

Price

£44.25Save 25%

Reference price: ~~£59.00~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

Variable density gives exposure control across changing light without swapping between fixed-strength ND filters.
The combined ND and black-mist effects provide exposure adjustment and light diffusion in one filter.
A 39mm thread is specified for cameras or lenses with a matching filter thread.

Cons

The black-mist diffusion is an intentional softening effect, so it may not suit images where crisp contrast is the priority.

Technical specifications

9 specifications

Identity
Brand	Urth
Model	45792338641047

Fit and filter
Thread size	39 Millimetres
Filter effect	Neutral Density
Filter factor	2 x
Coating	Multi Coating
Compatible devices	Cameras with 39mm filter thread size

Materials and protection
Material listed	metal
Water resistance listed	Water Resistant

What to know before buying

Listing details to confirm

The listing gives the ND range as 1–8.66 stops in one feature and 1–8.6 stops elsewhere. The detail field also labels 39mm as a screen size, although the product is a lens filter. Confirm the intended range and fit details for the selected listing. The water-resistance claim has no stated rating or test conditions.

Who is it for?

A good fit for

Photographers using a 39mm filter thread who want variable ND exposure control and diffusion together.
Landscape or nature shooters looking to manage exposure for long exposures or motion blur in changing light.
Video and portrait makers seeking a softer, hazier light treatment alongside exposure adjustment.

Less suited to

Users seeking an unsoftened, high-contrast image without a diffusion effect.
Users whose lens does not take a 39mm filter.

Urth 39mm Variable ND2–400 + ¼ Black Mist Filter (Plus) · photo 2 — Additional product photo 2

Customer reviews on Amazon

3.8 / 5 · 6 ratings

5 stars43%43%
4 stars19%19%
3 stars20%20%
2 stars18%18%
1 star0%0%

Aggregate customer ratings are mixed, with positive, middle and lower star categories represented. The small number of ratings does not establish what buyers liked or disliked, so it offers limited guidance on image effects or build quality. Consider whether the combined exposure control and diffusion suit your intended look.

Frequently asked questions

What filter thread size does this fit?

The listing specifies a 39mm filter thread and says it is compatible with cameras with a 39mm filter thread size. Check the lens thread before buying.

What does the filter do?

It combines variable neutral-density exposure control with black-mist light diffusion. The listed features describe a softened, hazier image effect.

What is the stated adjustment range?

The listing gives 1–8.66 stops in one feature and 1–8.6 stops elsewhere, so the exact stated endpoint is inconsistent.

Does it include a travel case?

A product-description panel claims a protective travel case, but no explicit package inventory is supplied here. Check the selected listing to confirm what is included.