Antlia 3nm SII Pro Series Filter - 2" - SII-PRO-3NM-2 Replacement Parts which means you use the

which means you use the telescope as a photographic lens—a very big photographic lens

iOptron has added features for convenience and functionality

Eye relief: 15 - 18mm

Be mindful of the power draw from your dew heater when using an ASIAIR

Download Celestron’s Starry Night Software and learn about the night sky

Antlia 3nm SII Pro Series Filter - 2" - SII-PRO-3NM-2 Replacement Parts which means you use theThis very narrowband 3 nm SII 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 drawer. Antlia 3nm Pro Series Sulfur II Filter 2" Mounted This Antlia SII Pro narrowband filter optimizes the FWHM (full width half maximum) to a 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro