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Thanks everyone ! I will get a 6".
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The Skywatcher Black Diamond BKP 150 OTAW Dual Speed is what I'm looking at as I notice it has the 10:1 dual speed crayford style focusser. None of the other 6 inch Newts I have seen here has that.
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Only thing is, it's an f5 not f4 - longer FL (750 vs 600), more reach, less coma, easier to collimate but less light ?
Anyone know if there is an f4 equivalent ? can't seem to find one in Oz online
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