Thread: collimation pic
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Old 08-11-2008, 03:58 PM
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Astro78
Tripping in Space

Astro78 is offline
 
Join Date: Oct 2007
Location: Sydney
Posts: 500
Hey hey Jupiter,

Your secondary mirror's looking a little oblique. You wanna try to get it looking like a perfect circle.

To make this a whole lot easier grab a piece of white paper and tape this on the inside of the OTA (optical tube assembly) opposite the focuser behind the secondary mirror. Otherwise this will be deceptively difficult.

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