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Explore Scientific Dielectric Diagonal - 99% Reflectivity - 2" Specifications
that accept 2" filters
This is the better choice of narrowband H-Alpha astrophotographer filter for highest contrast and revealing subtle nebula details
The design minimizes aberrations and distortions
the iOptron #3324 Counterweight Balance Kit
Antlia 4.5nm H-Alpha Edge Series Filter - 31 mm - HA-EDGE-4.5NM-31 Focusers Explore Scientific Dielectric Diagonal -This 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
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