Thread: Solar Sunspot Group AR2795 and AR2794 WL & Ha 27/12/2020
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Old 27-12-2020, 03:26 PM
Martin_S
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Martin_S is offline 		 
Join Date: Jul 2017
Location: Brisbane
Posts: 262
Thanks' Derek. I'm experimenting with aperture masks and focal reducers, to compensate for different seeing conditions The 180 Mak has a reasonable CA I've had good results at 135mm and will be making a set of masks to suit .

Martin
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