Optolong SHO-3nm narrowband filter kit 2" Optolong's SHO-3nm kit combines SII, H-alpha and OIII 3 nm narrowband filters for Hubble-palette imaging with monochrome cameras. The narrow bands reject mercury and sodium lighting and skyglow for high contrast even from light-polluted sites.
Manufacturer model: Optolong SHO-3nm kit 2" · Specifications checked against manufacturer data on 2026-11-03
Optolong's SHO-3nm kit combines SII, H-alpha and OIII 3 nm narrowband filters for Hubble-palette imaging with monochrome cameras. The narrow bands reject mercury and sodium lighting and skyglow for high contrast even from light-polluted sites.
| Format | 3 × 2" mounted |
|---|---|
| Kit contents | SII 3 nm, H-alpha 3 nm (656 nm), OIII 3 nm (500 nm) |
| Bandwidth | 3 nm each |
| Use | Monochrome CCD/CMOS cameras and modified DSLRs, one channel per filter |
Multi-layer anti-reflection coating on a non-cemented substrate, applied by ion-assisted deposition for durability and a stable centre wavelength with temperature.
2in mounted kit, not 36 mm unmounted.
| Kit contents | SII 3 nm, H-alpha 3 nm (656 nm), OIII 3 nm (500 nm) |
|---|
Data sheet
Optolong SHO-3nm narrowband filter kit 2" Optolong's SHO-3nm kit combines SII, H-alpha and OIII 3 nm narrowband filters for Hubble-palette imaging with monochrome cameras. The narrow bands reject mercury and sodium lighting and skyglow for high contrast even from light-polluted sites.
Manufacturer model: Optolong SHO-3nm kit 2" · Specifications checked against manufacturer data on 2026-11-03
