From the rental experts at Unicorn Films, the Hoya Variable ND (Variable Density II) gives precise, repeatable control over light with an adjustable range of approximately 1.5–9 stops, helping manage exposure in harsh daylight and mixed conditions without changing ISO or aperture. Rotate the outer ring to set the exact density needed ideal for maintaining a 180° shutter in video, or for creative long exposures and shallow DOF in stills.
A refined, thin double‑ring frame minimizes vignetting and includes a dedicated control knob plus density guide marks for quick, tactile adjustment. The top ring is sized one step larger than the rear thread to improve wide‑angle compatibility and accept a larger lens cap, with front threads available for caps or stacking as needed.
In video workflows, the filter allows consistent motion rendering by holding shutter speed near double the frame rate while lighting changes keeping movement smooth and natural. In stills, it enables longer shutter speeds for silky water and motion trails, or wider apertures in bright sun for creamy background separation. Built with Hoya optical glass, it maintains image quality and color neutrality across its working range when used within recommended settings.
As with all variable ND designs, pushing near maximum density can produce an “X‑pattern” and potential color shift; staying within the marked usable range and fine‑tuning composition, focal length, and density avoids artefacts. On very wide lenses, monitor for corner darkening and consider slight zoom‑in or reduced density to keep frames clean.
Partner with Unicorn Films for professionally prepped filters, tailored step‑rings, and on‑set guidance so exposure control is fast, accurate, and reliable from prep to wrap.
| Feature | Description | Benefit |
|---|---|---|
| Variable Density Range | Approx. 1.5–9 stops (ND3–ND400) | Replaces multiple fixed ND filters |
| Control Interface | Rotating double ring with control knob and density marks | Fast, precise, repeatable adjustment |
| Frame Profile | Thin, wide top ring; front threads available | Minimized vignetting; accepts larger lens cap |
| Optical Glass | Hoya optical glass | Clarity and color neutrality within working range |
| Use Cases | Stills: long exposure, shallow DOF in bright light | Creative control without changing aperture/ISO |
| Video Motion | Holds 180° shutter at set frame rates | Natural motion blur and cinematic feel |
| Wide‑Angle Notes | Reduced vignetting design; monitor ultra‑wide corners | Cleaner results on wider lenses |
| Typical Artefacts | “X‑pattern” near max density (common to variable NDs) | Avoid by staying within marked range |
Approximately 1.5–9 stops (ND3–ND400), suitable for most bright daylight and motion‑control needs.
Yes set your shutter near 180° relative to frame rate and use the filter to nail exposure for smooth, cinematic motion.
The thin frame reduces vignetting, but ultra‑wide focal lengths may still show corner darkening; zoom slightly or reduce density if needed.
A dark cross that can appear near maximum density on variable NDs; avoid by staying within the recommended working range.
Front threads allow caps and certain stacks, but stacking increases vignetting risk—evaluate per lens/focal length.
