Optolong L-Synergy 7nm Filter

Why do we make a L-Synergy filter?

The core innovation of L-Synergy filters lies not in a single functional breakthrough, but rather in the precise combination of traditional dual-narrowband (Ha & OIII) technology—specifically tailored for color camera users. By adopting a dual-filter setup of ‌”Ha & OIII + SII & OIII”‌, it overcomes the inherent limitations of color cameras in narrowband astrophotography. With L-Synergy, users can achieve ‌Hubble Palette-style deep-sky images‌ comparable to those captured by monochrome SHO (SII/Ha/OIII) systems—‌without switching to a monochrome camera or purchasing additional SHO filters‌.

This solution delivers ‌high-quality results with minimal investment‌, making professional-level narrowband imaging accessible to all.

1.  Optolong L-Synergy 

O‌potlong L-Synergy‌ is a dual 7nm narrowband filter compatible with DSLR cameras, color CMOS sensors, and CCD cameras, supporting telescope systems with F-ratio of F3.3 or above (slower system）. Its key advantage lies in enabling astrophotography amateurs to capture exceptionally detailed emission nebulae even in light-polluted environments.

After years of technical refinement, it has been optimized to minimize bright star halos while i