Quote:
Originally Posted by alpal
OK - do you have any photos of the setup for such a large scope?
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Actually, I do, but they're not digital. There are plenty of pictures online of the prime focus cage with one David Malin therein, and it does not need to rotate. The horseshoe or split-ring is an equatorial design, so there is no field rotation if you have a good polar alignment.
Here's one...
http://ftp.aao.gov.au/images/captions/aat004c.html