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Collimation With Web-Cam or CCD

Started by kberna1376, 12/01/2004 10:50PM
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Posted 12/01/2004 10:50PM Opening Post
Ken Bernardi
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Join Date: Oct 2002

Location: San Bruno CA, US

Posts: 19

Has anyone tried to collimate a SCT by using the out-of-focus image of a star from a CCD or web-cam image? I think that at f10 the image produced is about equivalent to a 10mm eyepiece which should be OK for collimation. You could actually measure the image to check the concentricity of the difraction rings.

Ken
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Posted 12/02/2004 01:29PM #1
Ed Abel
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Join Date: May 2003

Location: Winchester VA, US

Posts: 23

Ken:

Use of the Webcam or Video Camera is the easiest way for me to collimate. I am free to stand at the front of the SCT, adjust the collimation bolt(s), and see in real time what the effect is. My arms are not quite long enough for the C-14 to look in the eyepiece and adjust the bolt(s). Also, with my eyes it is MUCH easier to see the monitor screen than the view through the eyepiece.
Ed
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