[Lvas] Telescope making

[Gary Ahlers]

Thanks Fred.

The flocking is part of the manufacturingand not an option. I think it is embeded in the resin. I guess I can scrape it off if it becomes a problem. 

I gather your 8" was a Dob. It' s normal resting position is close to vertical and the weight is at the bottom. This may have contributed to your success. I saw alot of sway backed runs of 8" (horizontal) back in NYC. Out here I had a piece of 6" laying on the ground. It not only warped but charred and cracked in the sun! Anyway, weight was the main factor since this is for a GEM mount.

You have said several times that a Newt has to breath. I assume this is for mirror ambient temp.equilization? All of the Schmidt and other SCT variations have a closed tube How do they avoid this problem? Would having a tube with less thermal transmission help after the scope is at ambient?  What would happen if you sealed up the tube, ran it to a partial vacume and put a heater on the mirror to maintain constant temperature?
I'm heading out into the fringes now.

Regards,
Gary                 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lvlug.org/pipermail/lvas/attachments/20090723/c817074a/attachment.htm