Quote:
Originally Posted by Screwdriverone
......I have a secondary 2x barlow built in between the Secondary mirror and the primary mirror and this is held in by a sheath that shrouds the secondary mirror and basically passes behind the secondary and stops me from putting my hand in and holding the secondary while I tighten it all up.
The reason its there is because its a catadioptric short tube newt (500mm tube with 1000mm FL) so this is probably another reason for me to take to it with a baseball bat?
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OK, with that information, I change my advice. Smash it up with the sledgehammer and throw it on the fire. When you feel better, go and buy a nice 6" GSO tube unit - full length without that embedded x2 barlow!
Edit: OK, better not smash it up, but while I haven't tried to collimate one myself, there have been a number of people in here saying it was difficult if not impossible to successfully collimate a reflector with that intermediate barlow. I think that a reasonable quality tube without this barlow is readily available, quite cheaply, and that problem would then be gone. Not sure how well your EQ2 would cope with the extra weight and length?