Quote:
Originally Posted by JohnG
f/14-15 is not unusual for a refractor, was how they coped with the excessive colour in the image.
I would suggest around an 80mm/f/7 or thereabouts.
I dont use a guidescope anymore because of the duel chip in the ST4K but I have provision on the TSA-102 to carry a guidescope, an 80mm SW ED Pro when I use the DSLR.
My field setup with the GM-8 is the SW ED80 Pro with a WO 66SD as the guidescope, using a Q-Guider as an autoguider and the DSLR on the 80mm, makes for an excellent widefield setup.
Cheers
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One other thought. If you got an ED80 ($499) from Andrews then you would have a great guide scope. Also you could switch and guide through the C8 and image through the ED80.
Paul