Grinding the mirror with carbo 60
Making a 300mm f/d 4.6 mirror for new telescope
Grinding
the mirror with carbo 60
the
pitch polishing lap on the work post
pressing
the tool on the mirror
the
couder screen
The
foucault test apparatus
After many hours of work, the result:
max error=lambda/12, transverse aberration < 0.71 and no astigmatism.
For most informations about mirror making, read the very good book : How to make a telescope by Jean Texereau ( a french book translated in english)