Antlia 3nm H-Alpha Pro Series Filter - 2" - HA-PRO-3NM-2 (Pre-owned) Dioptrx Align your Celestron NexStar SE

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Antlia 3nm H-Alpha Pro Series Filter - 2" - HA-PRO-3NM-2 (Pre-owned) Dioptrx Align your Celestron NexStar SEIn Excellent Condition! This very narrowband 3 nm H alpha filter from Antlia is part of their Pro 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 3nm Pro Series H Alpha Filter 2" Mounted This Antlia H alpha Pro narrowband filter optimizes the FWHM (full