Antlia 3nm OIII Pro Series Filter - 2" - OIII-PRO-3NM-2 Baader Filters Counterweight and CW shaft

Counterweight and CW shaft

Focal Length: 30mm

8" Schmidt-Cassegrain optical tube assembly

25" compression ring adapter so you can use both 1

Don't let early morning dew stop you

Antlia 3nm OIII Pro Series Filter - 2" - OIII-PRO-3NM-2 Baader Filters Counterweight and CW shaftThis very narrowband 3 nm OIII 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 Oxygen III Filter 2" Mounted The Antlia OIII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro