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In good seeing I image unbinned, in poor seeing I image 2x2 binned. I should probably have done a lot more 2x2 binning this year! It has been a shocker! I calculate what the seeing is like from plate solving a 5s luminance at high altitude. My eye sight doesn't allow me to eye ball star twinkling very well. I cannot see it at zenith until it is HORRIBLE!
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