Antlia 4.5nm H-Alpha Edge Series Filter - 2" - HA-EDGE-4.5NM-2 2"/1.25" Eyepieces Compared to lower-priced large aperture

Compared to lower-priced large aperture binoculars

Aperture:  30 mm

NGC7000  © Tommaso Massimo Stella

or clip them to the case’s external loops

Barlows amplify the power of a telescope

Antlia 4.5nm H-Alpha Edge Series Filter - 2" - HA-EDGE-4.5NM-2 2"/1.25" Eyepieces Compared to lower-priced large apertureThis 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.