Re: ATM 14inch bvc glass,

["Bill Prewitt" <bprewitt@neo.rr.com>]

The laser test is the same, but the black glass makes them stand out better.
It helps to use an alcohol swab to clean the surface to be really sure you're
seeing pits instead of polish or dust.

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


>
> ive seen the laser test on a clear mirror,
> is it the same for a bvc mirror?
> im 10hrs into polishing and i still see
> the refractions on the surface,
> faint but there,
> i can see the spots 4 layers deep,
> kinda cool,
>
>
>