Baader Neodymium Moon & Skyglow Filter with IR Cut - 1.25" - FMS-1Baader 1. 25" Neodymium Moon & Skyglow Filter with IR Cut The Baader Planetarium Moon & Skyglow (Neodymium) Filter brings an entirely unique approach to planetary contrast enhancement and light pollution reduction. Based on earlier research at Carl Zeiss, Baader has developed a new filter that uses Neodymium glass which filters out a few specific wavelengths from streetlights as well as skyglow from the Moon. The unique spectral characteristics of