Urth 55mm ND2-400 Variable ND Lens Filter - Smooth Exposure Control

In this review the Urth 55mm ND2-400 Variable ND Lens Filter stands out as a practical tool for photographers who want reliable exposure control without changing filters mid-shoot. The single biggest reason to buy is its broad 1 to 8.6 stop range that enables both shallow depth of field and long exposures in changing light, making it particularly useful when shooting landscapes, sunsets or flowing water. The review focuses on build quality, optical performance, and everyday handling rather than marketing claims.

Key Features

• Wide density range: The ND2-400 range provides up to 18.66 f-stops of attenuation, allowing creative control over depth of field and motion blur in bright conditions.
• Locking rim: A min-max locking mechanism prevents over rotation and reduces the chance of the X-effect, keeping exposure consistent during adjustments.
• Superior glass: Eight-layer nano-coated Japanese AGC glass improves light transmission and reduces reflections for cleaner images.
• Ultra-slim design: The thin rim minimizes vignetting on wide-angle lenses while keeping the filter profile low for stacked use.
• Durable construction: The magnalium frame is light yet robust, and the product is backed by a lifetime quality guarantee.

Who It's For

The Urth 55mm ND2-400 is best for landscape and nature photographers who need variable density to adapt quickly to changing light or who want to create long exposures for motion blur and silky water effects. It also suits portrait shooters who prefer a shallower depth of field in bright sunlight without stopping down to extreme apertures.

Photographers who primarily shoot with very wide-angle optics that demand absolute zero vignetting at extreme settings, or those who prefer fixed-stop solid ND filters for absolute consistency, may want to compare alternatives. Still, for many hobbyists and enthusiast pros the flexibility and build quality make it an attractive all-purpose solution.

Pros & Cons

Pros

• Well built with a lightweight magnalium rim that feels durable and precise in use.
• Effective adjustment ability across a wide stop range, useful for sunsets and variable light situations.
• Optical coatings and Japanese AGC glass contribute to good light control and reduced reflections.

Cons

• Like other variable NDs, extreme settings can risk the X-effect on some lens setups, despite the locking rim.

Specifications

Our Verdict

The Urth 55mm ND2-400 is a versatile variable neutral density filter that delivers strong value for photographers who need adaptable exposure control and solid construction. Its broad stop range, quality glass and locking rim make it a reliable choice for landscapes, sunsets and creative long exposures without frequently swapping filters.

Frequently Asked Questions

Will this filter cause vignetting on wide-angle lenses?
Its ultra-slim rim is designed to reduce vignetting, but very wide-angle lenses at extreme settings may still show slight corner darkening.

Does the locking rim stop the X-effect completely?
The min-max locking mechanism reduces unwanted rotation and helps prevent the X-effect, though extreme density combinations on some lens setups can still produce it.

Is the glass durable and easy to clean?
The 8-layer nano-coated Japanese AGC glass resists reflections and is easier to clean than uncoated glass, while the magnalium frame adds lasting resilience.