What went wrong?

Started by streets, 10/23/2011 09:51PM
Posted 10/23/2011 09:51PM Opening Post
I recently acquired a Baader Hyperion 8-24mm zoom eyepiece. In checking it out I noticed a small well defined circle of blur in the exact center of the image.
At first I thought it was an incompatibility with my MAK that was causing this. I then looked through the eyepiece unattached to the scope and the problem was still there. Could the cause of this be one of the seven optical elements being inserted incorrectly? The eyepiece was returned for a full refund as I was not going to experiment. I was tempted to do so but common sense took over. Guesses, suppositions, and technical expertise will be appreciated.