Antlia 2.5nm H-Alpha Ultra Series Filter - 2" - HA-ULTRA-2.5NM-2 Cases the hard stops provide a

the hard stops provide a “fail safe” safety measure to protect the astrograph should the limit switches somehow fail

The quality and performance of this component can significantly enhance your stargazing experience

Celestron AstroFi 102 WiFi Maksutov Telescope

IGAD coatings also improve temperature and humidity stability of the filter performance

but the eye relief is not affected

Antlia 2.5nm H-Alpha Ultra Series Filter - 2" - HA-ULTRA-2.5NM-2 Cases the hard stops provide aThis very narrowband 2. 5 nm H Alpha filter from Antlia is part of their Ultra series and comes in a 2" threaded filter cell that is designed to be screwed on to the 2" receptacle of your astrophotography accessory, including a 2" filter wheel or filter drawer. Antlia 2. 5nm Ultra Series H Alpha Filter 2" Mounted All Antlia 2. 5nm Ultra Series Filters are made with quartz glass and undergo precisely controlled coating processes to ensure optimal