SVBONY 1.25" ND4 /ND8/ ND16/ ND1000 Neutral Density Filter for Telescope Eyepiece Reduce Moon Surfaces Overall Brightness SV139|Monocular/Binoculars| - AliExpress
Celestron Neutral Density 0.9 Moon Filter (1.25") 94105 B&H
Baader Neodymium (Moon & Skyglow) Filter
Celestron - Don't know if you need a Moon filter? Check out a Full Moon without a filter (left) and with a filter (right). Image by Erika Albino (@lovely_science_photos), captured through her