Used Hutech IDAS NGS1 Night Glow Suppression Filter - 2" SolarQuest Inside the case includes two

Inside the case includes two dense foam spacers and a built-in compression strap designed to customize the case for each telescope model

but nothing that noticeable

nonmetallic coating is 99% reflective across the full visual spectrum

especially in humid conditions

A proper flat frame is a capture using an evenly illuminated light source

Used Hutech IDAS NGS1 Night Glow Suppression Filter - 2" SolarQuest Inside the case includes twoThis is a 2" Hutech IDAS Night Glow Suppression Pollution filter in very good condition. The optics have a small amount of dust on the back side that we have not been able to remove; see the photos. We have reduced the price accordingly to account for this condition issue. This includes the jewel case. Description: The NGS1 is the world first filter that suppresses both man made and night glow interferences to the green, orange and red ranges. This is