I noticed the same thing on my ES but also noticed that the eye lens had fogged up on what was a very dewy night here in Bris. I assumed that was the cause and changed eyepieces. Thanks MortonH I will check again. Slightly off topic, I have a new Vixen 13mm LVW and it is absolutely wonderful. Sharp as a tack across the whole FOV and with great eye relief. Seems to be the perfect magnification and exit pupil in the Obsession.
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