Quote:
Originally Posted by N1
One thing I noticed about the 10" is that the tube seems unnecessarily large at nearly 12" external diameter, leaving a big gap of unused space around the mirror. The 8" is more efficient in that respect and its tube much smaller than the 2" difference suggests.
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I have a 10" skywatcher dob and the tube has a much smaller diameter than the GSO. I have GSO tube rings on it and had to pad them out (about 30mm less diameter than GSO) My 10" fits on the back seat of a lancer with the dob base, so go the aperture, 15kgs is not a big weight.