|
good info there Marc - thanks for posting.
Really good idea to countersink the locking screw contact points and have now modified mine.
Interested that you are getting good results with 3 side contact points. I found that I got minor astigmatism when I used a fairly similar setup - worst when scope was pointing such that a contact point was directly under the mirror. went over to 6 silicone dabs around the edge, but there was still a tiny bit of annoying residual astigmatism (the silicone apparently expanded/contracted when setting and put the glass under uneven tension/compression). Have just removed the silicone and am in the process of modifying the mirror holder to put in 6 adjustable nylon screws on extenders to get them up to the mirror CofG - but as you say, there is not much room in there.
I guess we could just buy fully sorted scopes, but where is the fun in that? Regards ray
Last edited by Shiraz; 17-10-2013 at 08:37 AM.
|