Optolong OIII 3nm filter 2" Optolong's OIII 3 nm narrowband filter passes a 3 nm band centred on 500 nm (the OIII 495.9/500.7 nm lines) for planetary nebulae, supernova remnants and bicolour or Hubble-palette work with monochrome cameras.
Manufacturer model: Optolong OIII 3nm 2" · Specifications checked against manufacturer data on 2026-11-03
Optolong's OIII 3 nm narrowband filter passes a 3 nm band centred on 500 nm (the OIII 495.9/500.7 nm lines) for planetary nebulae, supernova remnants and bicolour or Hubble-palette work with monochrome cameras.
| Format | 2" mounted |
|---|---|
| Bandwidth | 3 nm |
| Centre wavelength | 500 nm |
| Use | Monochrome CCD/CMOS cameras and modified DSLRs |
Multi-layer anti-reflection coating on a non-cemented substrate, applied by ion-assisted deposition for durability and a stable centre wavelength with temperature.
Single 2in mounted 3nm filter from the SHO-3nm range.
| Centre wavelength | 500 nm |
|---|
Ficha técnica
Optolong OIII 3nm filter 2" Optolong's OIII 3 nm narrowband filter passes a 3 nm band centred on 500 nm (the OIII 495.9/500.7 nm lines) for planetary nebulae, supernova remnants and bicolour or Hubble-palette work with monochrome cameras.
Manufacturer model: Optolong OIII 3nm 2" · Specifications checked against manufacturer data on 2026-11-03
