Filters

2 topics in this forum

1. New Optolong 3nm Narrowband filters

   By AstronomyUkraine, January 12
   • 1 reply
   • 42 views
   • 
   • TareqPhoto
   • January 12

2. Ultra narrowband filters with fast scopes

   By nickaltair, January 7
   • 0 replies
   • 24 views
   • 
   • nickaltair
   • January 7