Baader Planetarium 2" Oxygen III Nebula Filter

I like the case and package, it's tactile, easy to find in the dark - and easy to open.If you know what you're looking at and looking for there's no better way to spend almost $200 on just an accessory.

Threads onto my 2 inch diagonal or eyepiece and provides the proper filtering to observe various nebula.Baader quality, that says it all.

gracias