Okie dokie, bringing this thread back to life since there is some movement again. Minor movement, but forward movement.
So, here's the deal....
Current house is on the market and settling into where we'll be for the next 8-12 months (give or take). Just brought all the RVC-6N stuff over to Trudy's house and looking at actually getting things done.
First up is various calculations using the Newt Calculator that Dan suggested above. Got all the pertinent numbers, but one. Unfortunately, that's a big one.
Does anybody know if the focal length of the C6-N is typically written anywhere on the mirror? I couldn't find it, nor an engraving. There is some grease pencil writing on the side of the mirror (4 letters - NO, not like that). The letters are gibberish to me.
If I calculate the focal length in inches using 750mm as gospel (yeah, I know, bad idea) I come up with 29.5". With that I'm ready to go. Or not. In my calculations I've included 0.5" for extra focuser travel, hoping to allow for some slop. I also know there is some adjustability in the mirror cell, depending upon how loose or tight I make the springs. I figure this gives me 0.25"
Will that total fudge factor of 0.75" be enough to assume the focal length, or am I looking for trouble?
I'm trying to avoid cobbling together a Foucault tester just to measure the FL. Any other suggestions in this regard? I'm so ready to start moving forward on this again. I just don't want to shoot myself in the foot. My monkey brain says to measure the FL. The other side of my monkey brain wants to be lazy, but I think I could pay dearly for that.