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Re: [ATM] Flat lap foundations

Tony,

Tony Gondola wrote:
> Is it permissible to use a flat substrate for a pitch lap on mirrors of 
> moderate to long f ratio?

No problem.  I wouldn't worry about unless your lap is bigger than 16" 
or faster than F/4.  Just make the pitch a bit thicker.

I use flat substrates all the time.

	Mike Lockwood

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