Optolong SII 3nm 2" | PixelSkiesAstro
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  • Optolong SII 3nm 2" | PixelSkiesAstro

Optolong SII 3nm 2"

Optolong SII 3nm filter 2" Optolong's SII 3 nm narrowband filter isolates the ionised-sulphur emission line for the red channel of Hubble-palette (SHO) imaging with monochrome cameras.

Manufacturer model: Optolong SII 3nm 2" · Specifications checked against manufacturer data on 2026-11-03

Optolong SII 3nm filter 2"

Optolong's SII 3 nm narrowband filter isolates the ionised-sulphur emission line for the red channel of Hubble-palette (SHO) imaging with monochrome cameras.

Specifications

Format 2" mounted
Bandwidth 3 nm
Use Monochrome CCD/CMOS cameras and modified DSLRs

Coating

Multi-layer anti-reflection coating on a non-cemented substrate, applied by ion-assisted deposition for durability and a stable centre wavelength with temperature.

Manufacturer documentation

Optolong SII 3nm 2"

Compatibility notes

Single 2in mounted 3nm filter from the SHO-3nm range. SII centre wavelength not stated on Optolong SHO-3nm page.

73723

Ficha técnica

Bandwidth
3 nm
Format
2" mounted
Use
Monochrome CCD/CMOS cameras and modified DSLRs
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