Alstar 2" Moon/Skyglow Filter - Bundle with - 2" Telescope Moon Filter Kit

The filter is a multi-band pass filter which transmits a high percentage of light in the visual spectrum. It will enhance contrast when observing brighter objects such as the moon and planets and in the same time will suppress sky glow from artificial lighting and background reflected glow. The filter has a mild effect of darkening the background of the night sky so that the fainter objects will be against the dark background, excellent for observing planets. The filter will fit all standard sized 2" eyepieces and accessories such as Barlow lens etc. It is mounted in a nicely anodized Al alloy housing and is threaded on both sides for stacking with other 2" filters if necessary.

• By rejecting most other light this will cause certain objects to appear more clearly against a blacker background of space.
• Very high light transmission exceeding ninety five percent of that light some the portions of the spectrum; while blocking unwanted skyglow and many street light emissions
• Neutral density filters are excellent filters to reduce the overall brightness of an image to cut down glare while viewing bright astronomical objects through a telescope
• These three ND moon filters are useful for splitting binary systems; comfortably observing the moon; or stacking with other planetary filters
• ND filters retain true color balance of the objects being observed since all wavelengths are transmitted uniformly over the entire spectrum