These scope can be elevated from being a "toy" to giving really sharp images if one pays attention to the optics a little bit. I would not take anything for granted when it comes to the optics. As I said I have restored a number of scope like this and many scopes in general. People doing the restoration spend hours on the mechanics but make the mistake of believing there is nothing wrong with the optics. Unfortunately that is not the case and they are the most variable in quality of all the parts. The big mistake restores make is to just look through the scope and if the image looks "good" to them they believe all is fine. The problem is 1/2 wave or even worse optics will give an OK image that looks "good" too many at low to medium power or if the image looks to have issues, seeing, collimation, eyepiece quality etc are blamed vs the quality of the optics. A simple Foucault test will show if the mirror has errors and testing the quality of a diagonal against a known good one with show the quality of the diagonal...
I worked at a science center some years back and we had a veritable sea of RV-6's and a few RV-4's. I was rather fond of the 6's. The latter seldom got used, however. Impressive work on yours, by the way. Never had a chance to see what their stock performance was like.
Right now, I'm working on simply trying to get the telescope back into presentable condition. I'm disabled, so cash is always tight, but I did order a couple of .75" minor axis diagonals for another project (ex-Meade, I believe). As I mentioned, popping that mirror off and replacing it shouldn't be too difficult when the time comes. The primary, though, has a little oxidation around the periphery.
When I remove the cell to work on the brass, I might very well conduct that Foucault test, as I certainly have the gear to cobble something of a test stand together.
This has been a very tough year for me, and this telescope was supposed to be a simple, fun project. But I like the idea of turning it into an even more useful tool. Wasn't my original plan, as I have plenty of other telescopes. But seeing how far this narrow Newt can be pushed sounds like an interesting plan.
Edited by The_Vagabond, 18 December 2020 - 09:01 PM.