Thread: M27 and M57 nebula's
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Old 22-07-2017, 08:51 PM
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cometcatcher (Kevin)
<--- Comet Hale-Bopp

cometcatcher is offline 		 
Join Date: Jan 2005
Location: Cloudy Mackay
Posts: 6,542
F5 scopes definitely need correcting for coma. At F4 I still have some elongation at the edges even with the CC but I haven't experimented with the spacing to try and improve it either.
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