Dark Clear Skies 2″ CLS Filter WD-17 this telescope provides the optical

this telescope provides the optical excellence you need to take your astrophotography to the next level

Quality aspects of the new Astronomik MFR narrowband-emissionline filters:

and high-resolution visual work

They can use freely in the world

Dark Clear Skies 2″ CLS Filter WD-17 this telescope provides the opticalThe Dark Clear Skies 2 CLS (City Light Suppression) Filter is designed to reduce the effects of artificial light pollution while maintaining good transmission of natural starlight and broadband astronomical targets. Purpose & Use CLS filters are broadband light pollution filters intended to suppress common wavelengths produced by street lighting while preserving much of the visible spectrum. This helps improve contrast and darken the background sky