Hi Folks,
Just a quick question before I start on my new mirror.
The blank is hogged out to about f/5 (with a old pipe fitting) and I have made a tile tool to suit the shape. The mirror is not very spherical more like a hole in the middle.
Just wondering what stroke would be recommended to get things back more or less to a spherical shape. I am hoping to get the mirror to about f/4.7 when complete.
cheers and thanks for any advice..
Gary