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Re: ATM scratch


Measure the length, grind 15 minutes, measure again.
If you're making progress, you can continue with 9.

Don't let it dry out, though, or you will make more scratches.

             Bill Prewitt

My webpage of telescope making and caving
http://home.neo.rr.com/imaging

> 
> i have a faint 3inch scratch, 1/3rd out from center,
> im on 9micron,
> bvc glass,14inch
> do i stay with 9micron or go back to
> 15, or 30,
> thanks,
> 
> 
>