Thanks, Rich. Only problem I see with the MPCC is that you have to thread it into each eyepiece you use, which would get a bit old after a while if you change eyepieces regularly while observing. I can live with a slight increase in focal length as I'm only interested in visual observing. But you're right about the price. If I can't find one second hand then I'll be putting up with the coma!
Morton
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