Antlia 3nm SII Pro Series Filter - 1.25" - SII-PRO-3NM-125 Skywatcher Dobsonians About the Celestron AstroMaster 90AZ

About the Celestron AstroMaster 90AZ Telescope - 90mm Refractor w/AltAzimuth Mount

TeleVue Tele-Pod Tripod Specifications

Manufacturer: Sky-Watcher Model/SKU: S31000 Function: Losmandy style "D" type metal dovetail plate Hole Types: Numerous holes for mounting on a wide variety of telescopes Color: Anodized green to match Sky-Watcher signature color scheme

you won’t be able to see some of the most spectacular objects in the night sky entirely in the field of view of a common eyepiece unless you move your telescope around

Antlia 3nm SII Pro Series Filter - 1.25" - SII-PRO-3NM-125 Skywatcher Dobsonians About the Celestron AstroMaster 90AZThis very narrowband 3 nm SII filter from Antlia is part of their Pro series and comes in a 1. 25" threaded filter cell that is designed to be screwed on to the 1. 25" receptacle of your astrophotography accessory, including a 1. 25" filter wheel. Photo shows the 2" version of this filter. Antlia 3nm Pro Series Sulfur II Filter 1. 25" Mounted This Antlia SII Pro narrowband filter optimizes the FWHM (full width half maximum) to a 3nm bandpass. As the