How does a rotator help an alt/azmth telescope take images?

Subject: How does a rotator help an alt/azmth telescope take images?

Date: Thu Jan 4 13:23:56 2001
Posted by Dan
Grade level: grad (science) School: Northern illinois University
City: DeKalb State/Province: IL Country: No country entered.
Area of science: Astronomy
ID: 978632636.As

Message:


I want to know why a 'rotator' is used on ccd cameras mounted to telescopes 
that are using altitude/azimuth mounts. I understand the difference between 
that type of mount and a polar aligned mount but am unable to see why a 
rotator is needed.

Re: How does a rotator help an alt/azmth telescope take images?

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