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Webster Telescopes Forum • View topic - Rear light shroud for C Series telescope
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 Post subject: Rear light shroud for C Series telescope
 Post Posted: Mon Mar 14, 2016 9:31 pm 
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Joined: Tue Feb 21, 2012 4:52 pm
Posts: 4
Does anyone have experience with a successful light shroud for the C series scopes? I have a C22, and made a shroud out of 1/4" plywood with cutouts for the fans, alignment knobs, and each of the bolts projecting from the mirror cell frame. I used 1/4" thick rare earth magnets to attach it to the metal frame.

Unfortunately, even with a total of 1/2" width, there is insufficient clearance, and it gets caught with the cable loom for the fans.

Has anyone had a more successful experience?

thanks!!


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 Post subject: Re: Rear light shroud for C Series telescope
 Post Posted: Tue Apr 12, 2016 7:56 pm 
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Joined: Thu Jul 02, 2009 2:25 am
Posts: 122
1/16" Kydex sheet would be a better choice.

Using 1/16" adhesive magnetic strips to attach it to the cell frame. You can get a 25 foot roll for about $9 on Amazon. The adhesive is very tacky, so make sure you get it right the first time.


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 Post subject: Re: Rear light shroud for C Series telescope
 Post Posted: Tue Apr 12, 2016 11:38 pm 
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Joined: Tue Feb 21, 2012 4:52 pm
Posts: 4
Thank you.

I ended up using Kydex 0.04" thickness, with low-profile velcro. I was able to cover the rectangle with the fans (with holes for the fans, collimation knobs and projeting bolts and nuts) and thermo-molded the kydex to match the 150 degree angle and project over the rear part, leaving a 3" gap. I thermo-formed a right angle over the rear 1/2 " where the kydex crossed the mirror without support except on the two sides. The 1/2" right angle provides sufficient support to stop the Kydex from flexing. I am hopeful that blocking light from neighboring astronomers at dark sites will help me squeeze out faint fuzzies.

Please let me know if anyone is interested in more details.

-Sam


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 Post subject: Re: Rear light shroud for C Series telescope
 Post Posted: Mon Apr 18, 2016 10:55 pm 
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You know everyone wants to see some pictures posted!


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 Post subject: Re: Rear light shroud for C Series telescope
 Post Posted: Mon Apr 18, 2016 11:01 pm 
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Joined: Tue Feb 21, 2012 4:52 pm
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I didn't take any as I was building it. The next time I set up the scope will likely be at TSP, and I will plan to take some pictures then, and post.
-Sam


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