Thank you Steve and John for encouraging me to persist with 'oyster' doubles. I rarely get steady nights at this time of year and am constantly experimenting with eyepieces, masks, a barred eyepiece and a Barlow to reach the difficult ones. I sometimes find that covering up the scope for an hour and trying again later can result in improvements in seeing. However, be careful of this practice as the pleasant sound of rain on the roof can lead to a very fast run to the back yard! Kind regards, Eugene
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