Hi Seeker, don't you just hate nights like that.
I had one like that the other night. I set up and aligned then put on the DSI, took a test image and got a giant black smudge right in the middle of the FOV.
I had just cleaned everything that morning and thought I had managed to put a finger print on one of the filters. So I took the camera back inside and pulled it all apart looking for the smudge which turned out to be a cat hair which seems to infest everything we own.
I put it all back together again and went out just in time to watch the clouds roll in, some nights are just not meant to happen.
cheers
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