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Round Neutral Density Filters, Unmounted
We offer a range of round unmounted neutral density filters. These unmounted neutral density filters exhibit all of the useful attributes of our mounted filters, but will be found useful in special and built-in applications.
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| Diameter (mm) | Optical Density (OD) | Dimensions tolerance | Thickness tolerance | Parallelism | Surface Quality | Density Specifications | Wavelength Range (nm) | Thickness (mm) | Transmittance (%) |
|---|---|---|---|---|---|---|---|---|---|
| 25.0 | 2.00 | ±0.2mm | ±0.5mm | ≤ 3arcmin | 60 - 40 | @550nm | 400-700 | <5 | 1 ± 0.5 |
| 25.0 | 1.30 | ±0.2mm | ±0.5mm | ≤ 3arcmin | 60 - 40 | @550nm | 400-700 | <5 | 5 ± 1 |
| 25.0 | 1.00 | ±0.2mm | ±0.5mm | ≤ 3arcmin | 60 - 40 | @550nm | 400-700 | <5 | 10 ± 2 |
| 25.0 | 0.89 | ±0.2mm | ±0.5mm | ≤ 3arcmin | 60 - 40 | @550nm | 400-700 | <5 | 12.5 ± 2 |
| 25.0 | 0.70 | ±0.2mm | ±0.5mm | ≤ 3arcmin | 60 - 40 | @550nm | 400-700 | <5 | 20 ± 2 |
| 25.0 | 3.00 | ±0.2mm | ±0.5mm | ≤ 3arcmin | 60 - 40 | @550nm | 400-700 | <5 | 0.1 ± 0.07 |
| 25.0 | 0.60 | ±0.2mm | ±0.5mm | ≤ 3arcmin | 60 - 40 | @550nm | 400-700 | <5 | 25 ± 2.5 |
| 25.0 | 0.52 | ±0.2mm | ±0.5mm | ≤ 3arcmin | 60 - 40 | @550nm | 400-700 | <5 | 30 ± 3 |
| 25.0 | 0.40 | ±0.2mm | ±0.5mm | ≤ 3arcmin | 60 - 40 | @550nm | 400-700 | <5 | 40 ± 4 |
| 25.0 | 0.30 | ±0.2mm | ±0.5mm | ≤ 3arcmin | 60 - 40 | @550nm | 400-700 | <5 | 50 ± 5 |