Antlia 4.5nm H-Alpha Edge Series Filter - 2" - HA-EDGE-4.5NM-2 60 mm Spotting Scopes and provides an exceptional 7°

and provides an exceptional 7° field of view

With the fastar option on all EdgeHD optical systems

each pair of glasses is tested before shipment

Just rotate the handle to adjust the tilt angle for added convenience

Antlia 4.5nm H-Alpha Edge Series Filter - 2" - HA-EDGE-4.5NM-2 60 mm Spotting Scopes and provides an exceptional 7°This narrowband 4. 5nm H alpha filter from Antlia is part of their Edge 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 holder. Important! Not for use when viewing or imaging the Sun! Antlia 4. 5nm Edge Series H Alpha Filter 2" Mounted Antlia H alpha Edge narrowband filters optimize the FWHM (full width half maximum) to a 4.