The Optolong L-Para 2″ Dual Band Filter is an astrophotography filter engineered to enhance contrast and minimize light pollution when capturing deep-sky objects. Designed to selectively transmit Hydrogen-alpha (Ha) at 656.3nm and Oxygen III (OIII) at 500.7nm, it allows astrophotographers to isolate emission lines while effectively blocking unwanted artificial and natural skyglow.
You can scroll down to the end of this article to view a video review of the Optolong L-Para 2″ Dual Band Filter by the team at High Point Scientific.
With high transmission efficiency across both bands and excellent optical coatings, the Optolong L-Para 2″ Dual Band Filter enhances image sharpness and detail, making it an excellent choice for narrowband imaging with both color and monochrome cameras. Its advanced multi-layer anti-reflection coatings help reduce halos and ghosting, while the standard 2-inch (M48) threaded design ensures compatibility with most astrophotography setups.
Optimized for light-polluted environments, this filter enables astrophotographers to capture high-contrast, richly detailed nebulae and deep-sky images without requiring a fully dark sky. By improving the signal-to-noise ratio and enhancing color separation, the Optolong L-Para filter is a great tool for achieving high end astrophotography.
You can learn more about the Optolong L-Para 2″ Dual Band Filter here.
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