Levenhuk 1.25" Optical Filter #56 (Light Green), 53% light transmission, for planetary observations Perfect for observations of the solar system planets and their satellites With this filter you will be able to study the tiniest details of observed celestial objects Levenhuk optical filter #56 transmits up to 53% of visible light This filter has a barrel diameter of 1.25 in. so it can be used with telescopes of any brand Warranty: Six months