View Single Post
  #297  
Old 19-04-2017, 05:36 PM
dave brock's Avatar
dave brock
Registered User

dave brock is offline
 
Join Date: Dec 2011
Location: hamilton nz
Posts: 82
Quote:
Originally Posted by nobby2 View Post
My Big doubt and first question is: My required Sagitta is only in a narrow circle in the middle of the mirror. Tutorials I have watched on line maintain the depth out toward the edge.
Not entirely sure what you mean here. Maximum sagitta should only be in the middle and reduce as you go to the edge. I don't see any evidence of a hole in the pic of the mirror surface. If the curve is spherical then your strokes will be smooth and without any sticking/slipping. Just a nice even drag over the whole stroke. The surface of the mirror should also look nice and even with no areas that have obviously coarser pits.

Dave
Reply With Quote