From: hermit 
To: Aditya Munshi 
CC: atm{at}shore.net
Reply-To: hermit 


Aditya Munshi wrote:
>
> Hi everyone,
>
> I am almost done correcting my 8" f/7 to a sphere. There is almost
> nothing left if the TUE only a central hole persists ? What I would like
> to know is how do I measure the magnitude of the central depression and
> how much can I correct in the final figuring ? Would it be advisable to
> correct the surface to a sphere now or to merge the hole into the
> parabola itself ?
>
> I need your thoughts on this
>


Final figuring consists of digging a hole in the center and rollingthe
edge. You're in good shape. ;-)

Ken

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