| Country of Origin | China |
|---|---|
| Manufacturer Warranty | 3 Years |
| Materials sourced from | China |
| warranty | 3 Years |
| Brand | Unbranded |
| Surface shape | λ/4 |
| Degree of finish | 60/40 |
| Type | Filter |
| Filter material | optical glass |
| Features | Astronomical Color Camera Light Pollution Decrease |
| To Fit | Astronomical Color Camera |
Check the listing for details. Optolong 3nm L-Ultimate 2 Narrowband Filter for Camera Light Pollution Decrease. Condition: New, Made in China. Listed at 284.48 USD. Bandwidth value: OIII 3nm; Ha 3nm. Therefore, it can make the sky background of the image darker, and maximize the contrast and signal-to-noise ratio between nebulae. - Cutoff range: 300 - 1000nm. - Cutoff depth: > OD4.
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