Antlia 2.5nm SII Ultra Series Filter - 2" -SII-ULTRA-2.5NM-2 Svbony Hinged ring system separates easily

Hinged ring system separates easily by loosening the over-sized metal thumbscrews

Extremely high transmission results in maximum contrast and isolation of planetary details

Pentax High-Grade Lanthanum Optics for Exceptional Image Quality

No special setup effort is needed

Antlia 2.5nm SII Ultra Series Filter - 2" -SII-ULTRA-2.5NM-2 Svbony Hinged ring system separates easilyThis very narrowband 2. 5 nm SII 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" barrel of your astrophotography accessory, including a 2" filter wheel or filter drawer. Antlia 2. 5nm Ultra Series Sulfur II Filter 2" Mounted All Antlia 2. 5nm Ultra Series Filters are made with quartz glass and undergo precisely controlled coating processes to ensure optimal