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Re: Visual Or Camera Focusser

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Posted by Stephen Campbell on February 15, 2001 09:08:34 UTC

The hardware your referring to is called an off-axis guider,basically a tee-shaped tube with a small prism to redirect some of the light to an eyepiece with cross hairs,this is used to ensure proper tracking,the focal length from secondary mirror to guider eyepiece is the same as the secondary mirror to camera focal plane.
check out lumicon,orion.

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