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Old 25-10-2019, 07:39 PM
Star Catcher (Ted Dobosz)
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Star Catcher is offline
 
Join Date: Feb 2006
Location: Bankstown
Posts: 981
Quote:
Originally Posted by lazjen View Post
I got an old broom handle and marked off the length and put some soft tape over the end to protect the mirror. Then I inserted it from the back to check the distance. I think I'm close. I can probably iterate from here with star tests,

On the issue of the secondary marker: with the use of a laser I think I've worked out that the secondary marker circle is very slightly off centre. With the focuser removed, I got the laser attached using the same adapter for the tak scope. I could see the laser form a point back on itself.

When I put the focuser back on, and attached the laser, and then rotated the focuser, it made a small circle around the mid point. I think I need to collimate my Moonlite focuser. I'm going to send off a message to find out how, since a video showing what to do has bits that mine does not seem to have. I should point out that before I put the focuser on, I made the collimation as good as I could get with the tak scope.

At this point, I'm not sure if I can properly test the system since the focuser is not correct.
It should not scribe a circle. You cannot collimate it in that condition. There are a few videos which you have probably already checked and was not happy with.

https://www.youtube.com/watch?v=DWMQh6OvpJc

https://www.youtube.com/watch?v=Mw4hIq_byp4
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