77mm Variable ND2-ND400 Neutral Density Filter - Adjustable 1-9 Stops

Our review of the 77mm Variable ND2-ND400 Neutral Density Filter finds it best suited to photographers and videographers who need flexible exposure control without swapping filters. The single biggest reason to buy is its wide 1 to 9 stop range combined with premium AGC optical glass and multi-layer coatings, which together make it a reliable tool for bright daylight shooting, long exposures, and controlled depth-of-field in mixed lighting. The review notes a natural limitation at maximum density where certain lens and focal length combinations can produce a temporary X black cross effect.

Key Features

• Premium optical glass: Crafted from AGC optical glass with 8 multi-layer coatings to reduce reflections and maintain image quality under bright conditions.
• Adjustable light control: Offers 1 to 9 stops of variable ND via 360-degree rotation for precise exposure adjustments without changing filters.
• Low-reflection surface: Multi-layer coatings and an oxidized sandblasted metal finish minimize stray light and unwanted reflections on the filter surface.
• Slim, secure build: At about 7.4mm thickness with a CNC-patterned edge, the filter is easy to rotate and attach while remaining slim enough to reduce vignetting on many lenses.
• Wide compatibility: Designed for lenses with a 77mm thread size and requires an 82mm lens cap for protection when mounted.

Who It's For

The filter is ideal for landscape photographers shooting in bright sun, portrait shooters who want to open aperture for shallower depth of field in daylight, and videographers needing smooth exposure control while recording. Its broad 1-9 stop range and sturdy coated glass make it a practical, single-filter solution for field work.

Photographers using ultra-wide or specific lenses prone to polarization artifacts should test for vignetting and the X cross effect at maximum stops; those who need absolute color neutrality under every focal length may prefer single-stop screw-in ND filters for critical work.

Pros & Cons

Pros

• High-quality AGC optical glass with 8 multi-layer coatings improves contrast and reduces flare.
• Wide 1-9 stop adjustable range gives flexibility for exposure and creative control without swapping filters.
• Slim 7.4mm profile and CNC-patterned edge make it easy to mount and rotate while reducing bulk.
• Oxidized sandblasted finish reduces stray light and keeps reflections to a minimum.

Cons

• At maximum density some lenses and focal lengths can show a temporary X black cross pattern; this is a known, natural interaction with variable ND designs.
• Some customers report mixed results on color accuracy and slight vignetting on certain wide-angle setups.

Specifications

Filter thread size	77mm
Density range	ND2 to ND400 (approximately 1 to 9 stops)
Glass	AGC optical glass with 8 multi-layer coatings
Thickness	Approx. 7.4mm
Finish	Oxidized sandblasted metal, CNC-patterned edge
Rotation	360-degree adjustable
Cap requirement	82mm lens cap needed when mounted

Our Verdict

This variable ND filter is a strong value for photographers and filmmakers who want flexible exposure control and solid optical performance without carrying multiple screw-in NDs. Its AGC glass and multi-layer coatings deliver good flare control and durability, while the 1-9 stop range handles most daylight situations. Buyers who require perfect color neutrality or shoot with lenses known to produce strong vignetting should test before relying on maximum density positions.

Frequently Asked Questions

Will this fit my lens?
It fits lenses with a 77mm filter thread; check your lens barrel for the diameter symbol and number before ordering.

What is the X black cross effect?
At extreme density settings some variable NDs can produce a temporary cross pattern depending on lens and focal length; this is a known optical interaction, not permanent damage.

Does it cause color shift?
Most users report acceptable color with coated glass, but a few note slight color variation in some setups, so test on critical work.