The Hard Stop ND is a professional-grade Variable Neutral Density filter designed to control exposure without the risk of cross-polarization artifacts.
| Filter Type | Variable Neutral Density (VND) |
| Density Range | 0.6 to 1.5 (2 to 5 Stops) or 1.8 to 2.7 (6 to 9 Stops) |
| Material | CNC Machined Aluminum Frame and High-Definition Optical Glass |
| Thread Sizes | Available in 67mm, 72mm, 77mm, and 82mm |
The hard stops provide physical limits that prevent the filter from rotating into the cross-polarization zone, ensuring you never get a dark 'X' across your image.
No, high-quality Hard Stop ND filters use precision-ground optical glass that allows the camera's phase-detection and contrast-detection autofocus systems to function normally.
Usually no. Most Hard Stop NDs have a slightly larger front diameter to prevent vignetting, often requiring a cap one size larger (e.g., an 82mm filter may need an 86mm cap).