Antlia 4.5nm H-Alpha Edge Series Filter - 31 mm - HA-EDGE-4.5NM-31 deposit eligible With a T thread bringing

With a T thread bringing it all together

The angle adjustment range is +/-1º and the adapter is marked with 5' increments to make adjustments easy

Prism Coatings: Phase Coated

and carry handle

Skywatcher Virtuoso GTi 150P Highlights

Antlia 4.5nm H-Alpha Edge Series Filter - 31 mm - HA-EDGE-4.5NM-31 deposit eligible With a T thread bringingThis narrowband 4. 5 nm H alpha filter from Antlia is part of their Edge series and is of the 31 mm unmounted variety. It is normally used in a 1. 25" 31mm filter wheel, where it drops into place. Important! Not for use when viewing or imaging the Sun! Antlia 4. 5nm Edge Series H Alpha Filter 31 mm Unmounted Antlia H alpha Edge narrowband filters optimize the FWHM (full width half maximum) to a 4. 5nm bandpass. The suppression of optical density (OD)5