by Aratus » Fri Feb 12, 2016 12:15 am
I don't have this eyepiece, but it is designed to allow an astronomical telescope to be used for terrestrial objects, like birdwatching etc. I imagine that since these eyepieces were not designed for astronomical viewing they didn't put a filter thread on the barrel.
Last edited by
Aratus on Sun Feb 14, 2016 7:34 pm, edited 1 time in total.
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.