Hi and thanks in advance for any input.
I've recently been gifted a what appears to be completely hand built 1940s 8” Newtonian refractor. I’m really keen on refurbishing and getting it to be a viewable instrument to introduce my kids into astronomy with history. I have a decent deal of experience with newer technology but have never touched anything older than 10 years. Any insight is greatly appreciated.
what’s in the boxes:
60”x8-1/2” tube with spotter mount up to 1-3/4”
focal length from primary to secondary mirror 45-1/2”
tripod with counterweights
rack and pinion equatorial mount made by watts
4 eye pieces
4 prisms of various size types and finish
8” main mirror encased in non removable housing
all optics require cleaning/alignment as this has been in storage for the last 30 years.
I’m trying to ascertain what I’m missing from the mount as it uses a third reflecting mirror Or prism so the user doesn’t need to stand on a viewing staircase.
considering it’s age it’s in pretty good shape.
Any pointers on where to start?
How should I clean the primary reflector as it’s encased in wood and I don’t want it to swell and distort the mirror?
EDIT: How should I clean this vintage mirror I.e. collodion, dish soap with d.i. Waters, or other means and how could I identify a older collodion coating on the surface?
Edited by Cato85, 24 September 2020 - 06:45 PM.