We all make dumb mistakes. A few of mine
Forgetting to switch to bulb after taking flats and only finding out after an eight minute exposure that was only a few seconds.
Not setting ISO back to 200 from 1600 after test shots. Have you ever seen a fifteen minute exposure at ISO 1600 at F/2.8?
Forgetting to connect the guider cable to the mount
and so on
Remember if you are not making mistakes you just are not trying hard enough!
Bert
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