Optolong L-Synergy filter 2" The L-Synergy is a dual 7 nm narrowband filter passing OIII (500.7 nm) and SII (672.4 nm) for colour cameras. Paired with an H-alpha/OIII filter such as the L-eXtreme, it lets colour-camera users build Hubble-palette (SHO) images. It is optimised against bright-star halos and suits systems of f/3.3 or slower.
Manufacturer model: Optolong L-Synergy 2" · Specifications checked against manufacturer data on 2026-11-03
The L-Synergy is a dual 7 nm narrowband filter passing OIII (500.7 nm) and SII (672.4 nm) for colour cameras. Paired with an H-alpha/OIII filter such as the L-eXtreme, it lets colour-camera users build Hubble-palette (SHO) images. It is optimised against bright-star halos and suits systems of f/3.3 or slower.
Specifications
Format
2" mounted (M48 × 0.75)
FWHM
OIII 7 nm; SII 7 nm
Centre wavelengths
500.7 nm; 672.4 nm
Suitable optics
f/3.3 or slower
Thread
M48 × 0.75
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.
Optolong L-Synergy filter 2" The L-Synergy is a dual 7 nm narrowband filter passing OIII (500.7 nm) and SII (672.4 nm) for colour cameras. Paired with an H-alpha/OIII filter such as the L-eXtreme, it lets colour-camera users build Hubble-palette (SHO) images. It is optimised against bright-star halos and suits systems of f/3.3 or slower.
Manufacturer model: Optolong L-Synergy 2" · Specifications checked against manufacturer data on 2026-11-03
