Soft Graduated Neutral Density Filter - Custom ND2 to ND64 Values, 37mm to 150mm Diameter Options
BST Round Soft Graduated Neutral Density (SGND) filters provide professional-grade light control with smooth, natural transitions between ND and clear areas. Ideal for photography and cinematography applications requiring precise exposure management.
- Optimal ratio of ND, transition, and clear areas for natural gradient effects
- Double-sided SGND coating with near-zero color deviation
- Accurate ND value stops ensuring consistent performance
- Available in standard sizes from Φ37mm to Φ150mm
- Customizable ND values, frame materials, and surface treatments
| Parameter | Specifications |
|---|---|
| Glass Material | AGC / Germany SCHOTT / Corning / other designated brands |
| Filter Lens Thickness | 0.55mm / 0.7mm / 0.8mm / 1.1mm / 1.3mm / 1.5mm / Custom |
| Filter Lens Resolution | HD Resolution |
| Coating | Double-sided SGND+AR (Anti-reflection coating), Double-sided AF (Waterproof, oil proof, scratch proof) |
| Frame Material | Aluminum / Copper |
| Frame Interface | Thread / Magnetic |
| Frame Thickness | 4.5mm / 4.75mm / 5.5mm / 5.9mm / 7.0mm / 7.5mm (Customizable) |
| ND Specifications | Standard: ND2/4/8/16/32/64, Custom values available |
| Common Product Sizes | Φ37mm, Φ39mm, Φ40.5mm, Φ43mm, Φ46mm, Φ49mm, Φ52mm, Φ55mm, Φ58mm, Φ62mm, Φ67mm, Φ72mm, Φ77mm, Φ82mm, Φ86mm, Φ95mm, Φ105mm, Φ150mm |
| F-stop Reduction | Optical Density | ND Number |
|---|---|---|
| 1 | 0.3 | ND 2 |
| 2 | 0.6 | ND 4 |
| 3 | 0.9 | ND 8 |
| 4 | 1.2 | ND 16 |
| 5 | 1.5 | ND 32 |
| 6 | 1.8 | ND 64 |
All BST filters undergo rigorous quality control with excellent consistency across mass production. We offer comprehensive packaging solutions including custom boxes, cleaning cloths, manuals, and accessories tailored to your requirements.
Bright Shadow Technology Co., Ltd. operates from a thousand-level clean room facility in Huizhou, Guangdong. With over 15 years of optical expertise, we specialize in ODM/OEM services for camera filters, drone lenses, and sunglass glass, delivering consistent quality and rapid response to customer needs.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.