Baader 2″ Universal Flange for SolarSpectrum H-alpha Filters Player One Mars-C II Whether you're observing terrestrial objects

Whether you're observing terrestrial objects or the night sky

This is the official description on Sony website

For best performance and hardware protection

as they effectively block all kinds of light pollution

Baader 2″ Universal Flange for SolarSpectrum H-alpha Filters Player One Mars-C II Whether you're observing terrestrial objectsBaader 2 Universal Flange Perfect for enhancing solar observation setups, the Baader 2 Universal Flange is designed for compatibility with SolarSpectrum H alpha solar filters and Telecompressor. With high quality build and adaptable threading, this flange is ideal for various solar astronomy configurations. Key Features Drillings for SolarSpectrum Filters and Telecompressor: Custom drilling design tailored to securely fit SolarSpectrum H alpha solar