Urth 55mm ND2-400 Variable ND Filter, 1–8.66 Stops

Stops: The Urth ND2-400 variable neutral density filter is a 55mm screw-on filter for cameras with a matching thread. Its adjustable light reduction is intended for controlling exposure in changing light, including long-exposure and shallow-depth-of-field techniques.

At a glance

Variable ND range is presented as 1–8.66 stops for adjusting exposure in changing light.
The listing describes a minimum-to-maximum locking rim to limit over-rotation and the X-effect.
An ultra-slim rim is claimed to help reduce vignetting.
The filter is intended for long exposures, motion blur and shallow depth of field.

Price

€47.20Save 20%

Reference price: ~~€59.00~~

Price checked: 13 Nov 2026

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Pros and cons

Pros

Variable light reduction gives more exposure control without changing filters.
The 55mm thread suits lenses with a matching filter thread.
A locking mechanism and slim-rim design are practical features for variable-ND use.

Technical specifications

13 specifications

Identity
Brand	Urth
Model	UNDX400ST55

Filter and compatibility
Filter type	Neutral Density
Thread size	55 Millimeters
Compatible devices	All cameras with a 55mm lens
Filter factor	400 x
Exposure control type	Manual (M)

Materials and protection
Material listed	Optical Glass
Coating	Nano Coating
Water resistance listed	Water Resistant

Dimensions and other details
Dimensions (L × W)	5.5L x 5.5W centimetres
Screen size	1 Inches
Number of items	1

What to know before buying

Listing details to confirm

The listing's construction and coating details are inconsistent: it names 20-layer nano coating in the title but describes 8-layer Japanese AGC glass in a feature, and separately lists optical glass and a magnalium build. The 1-inch screen-size entry is also unexplained for a lens filter, while the claimed slim, vignetting-reducing rim and the specific filter performance are not independently confirmed. Check the selected listing if these details affect your choice.

Who is it for?

A good fit for

Photographers or videographers with a 55mm-thread lens who want adjustable neutral-density reduction for changing light.
Users aiming to experiment with slower shutter speeds, motion blur or wider apertures.

Less suited to

Owners of lenses without a 55mm filter thread, unless they have a suitable adapter.
Wide-angle users seeking a specifically recommended filter range, as the listing suggests considering other ND ranges for wide-angle lenses.

Urth 55mm ND2-400 Variable ND Filter, 1–8.66 Stops · photo 2 — Additional product photo 2

Customer reviews on Amazon

Customer feedback highlights adjustability, functionality, value and a low-profile design. Image quality and fit receive mixed reports, with some customers describing clear images and a correct fit while others mention blurriness or fit issues. That variation matters because this filter is intended to control exposure while preserving useful image quality, and compatibility depends on a matching 55mm thread.

Positive themes

Customers report appreciating the adjustable ring and its smooth movement with some resistance.
Customers mention functionality, versatility, value and the low-profile design positively.

Mixed feedback

Reports of image quality differ, with some customers describing clear images and others reporting blurriness.
Fit feedback is mixed, with some customers finding it correct and others reporting issues.

Frequently asked questions

What lens thread does this filter fit?

It is listed as a 55mm filter for cameras with a 55mm lens. Confirm the filter thread size on your lens before ordering.

What is the claimed adjustment range?

The title and feature text claim an ND2-400 range and 1–8.66 stops of light reduction.

Is it recommended for wide-angle lenses?

The listing recommends considering other variable or fixed ND filters for wide-angle lenses, rather than presenting this model as its preferred option.