The Astronomik CLS (City Light Suppression) CCD EOS Clip is a great filter against light pollution in a clip design for Canon EOS DSLRs. It blocks emissions of artificial light sources like streetlights and airglow. It enhances the contrast between our “desired” objects and the background. 92% transmission at 486nm (H-beta), 92% transmission at 496nm (OIII), […]








