Hi Cloudy Nighters! I've been lurking for a few weeks and just signed up for an account.
My dad recently gave me the 4 1/4" Edmund Newtonian (white tube) that he bought as a teenager. My goal is to bring it to a "useable" state while staying as true as possible to it's original form.
This is the first telescope I've owned so I'm sort of a newbie at this, but I used to run collage observatory open houses with a Celestron 16" SCM back in the early 90's so it is all a bit familiar at the same time. I'm also getting involved in our local astronomy club and may eventually bring the Edmund to star parties for the sheer "look at what you can do with this antque" value.
From what I can tell the primary is in pretty decent shape (especially given that it has spent about 50 years in attic!) the but the "secondary" (aka mirrored prism) has a thick yellow cast to it. Do you guys have any advice on how to clean the secondary, and especially how to get it back in exactly the right place once it has been cleaned?
Another related question is what do you find is the best way to collimating these scopes? I'm very reluctant to mark the center of the primary because if it's small size and the coating's age. At f10.5 it shouldn't be too challenging but I would like to get the best performance I can out of the little old scope...
Thank you, Andrew
Edited by xnasageek, 07 January 2019 - 11:06 PM.