<https://stargazerslounge.com/topic/310043-has-anyone-seen-this-effect/#comment-3391295>
<http://schema.org/text>
"Are you using an OAG?\n \n\n\n\tIf so...and its quite common (at least for me!) is the OAG prism is impinging on the optical path to such a degree that it's  preventing full illumination of the sensor. This would necessitate moving the prism further out of the optical path.\n \n\n\n\tSteve\n \n"
<https://stargazerslounge.com/topic/310043-has-anyone-seen-this-effect/?tab=comments#comment-3390936>