I have a GSO 2 inch eyepiece (42 and 30mm) and got a GSO 2 inch focal reducer 0.5x.
When I connect the focal reducer to the bottom of the eyepiece and try to view (trying to get wider sky view) - it is appearing slightly out of focus.
Is that the backfocus issue that I need to resolve through some adapter between the eyepiece and reducer ?
Please help advise.
Thanks and Regards