Antlia 3nm H-Alpha Pro Series Filter - 31 mm - HA-PRO-3NM-31 iOptron iAFS Electronic Focuser They can be attached to

They can be attached to either side of each axis to accommodate right or left-handed users

Aperture (mm): 40 mm (1

(including internal rechargeable battery)

FILTER SIZE 140 mm MANUFACTURER Baader Planetarium SKU (#) 2459313 USAGE Visual solar observation and imaging at high magnification ASTROSOLAR FILM AstroSolar Safety Film OPTICAL DENSITY 5

Includes carrying straps and a soft carrying case

Antlia 3nm H-Alpha Pro Series Filter - 31 mm - HA-PRO-3NM-31 iOptron iAFS Electronic Focuser They can be attached toThis very narrowband 3 nm H alpha filter from Antlia is part of their Pro 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 3nm Pro Series H Alpha Filter 31 mm Unmounted This Antlia H alpha Pro narrowband filter optimizes the FWHM (full width half maximum) to a 3nm bandpass. As the bandwidth becomes narrower, the 3nm