[ATM] 12 inch binocular scope

[Mel Bartels]

> My girlfriend and I are making two 12 inch mirrors. We want to build a 12
> inch binocular Newtonian. We found information about building binoculars,
> but not about the f/value tolerance of both mirrors. Could someone point 
> me
> to that kind of information?

There's a binoc discussion group: binewt at yahoogroups.com

I believe the consensus is to keep focal length tolerance to 1% or better. 
If you use the same tool and make both mirrors at once, I don't think this 
is too much of an issue.

Mel Bartels