These neutral density filters use optical glass to transmit light consistently across the
entire visual spectrum. Anti-reflection coatings having been applied on both sides of the filters.
They are ideal for reducing glare when observing the Moon with various size telescopes and
under different magnifications, thus significantly increasing the level of detail. The filters
may also be used to split close double stars where one of the binary pair is significantly brighter
than its companion.
The Opticstar 1.25” Moon filters feature a 13% and 25% light transmission respectively and
are mounted in an aluminium cell that is threaded for filters.