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Focusing hassles
Okay focusing is driving me nuts.
I'm shooting with a crop sensor DSLR into an 8" f/5 Newt. It's a nice new GSO with a nice new Crayford focuser, which does have a locking screw on it. For some reason I focus it perfectly before alignment then an hour later it's significantly out of focus. I've had two wasted nights of imaging because of this problem.
I know that ytou're supposed to let them cool a while before using them and I kinda neglect to do that; also drift aligning / 3-star alignment makes the thing slew around a fair bit... but once I start guiding I can't go messing around with the focus as touching the camera/OTA makes the guiding fail.
My question is what order should I be doing the following:
- focus DSLR
- drift align
- 3-star align
- select & slew to target
- put guide camera in guidescope
- begin guiding
That's the order I've been doing things but there clearly needs to be another DSLR focus in there somewhere. Suggestions??
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