DescriptionSpecifications
Catalog PDF
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Our popular absorptive neutral density filters are offered in this set. They can also be purchased individually. See Absorptive Neutral Density Filters for more details. |
The absorptive neutral density filters come in many different optical densities, from an OD of 0.05 to 4.0. These filters can be stacked to produce the specific optical density that you require. Two popular sizes are available 1” round or 2” square. |
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| Specifications |
| Material | Neutral density colored glass (BK 7 or equivalent for 0.05 OD) |
| Clear Aperture | ≥central 80% of dimensions |
| Surface Quality | 60-40 scratch-dig |
| Dimensions | ±0.3 mm |
| Thickness | 1.57–4.19 mm (0.05 OD, 3.0 ±0.1 mm) |
| Wedge | ≤3 arc min |
| Chamfers | 0.25-0.76 mm face width x 45° ±15° |
| Angle of Incidence | 0° |
| Optical Density Tolerance | ±4% at 546.1 nm |
| Cleaning | Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended |
| Damage Threshold | 30 W/cm2 CW, typical |