Re: [ATM] Amount of Under Correction??

["Mel Bartels" <mbartels@bbastrodesigns.com>]

> I was told that fast thick mirrors should be under correction to
> compensate
> I wanted to ask it this is true that I should under correct the mirror and
> by how much?

Imagine this: a perfectly corrected mirror that is actively cooled by fans
and thus maintains its nice parabola all through the night regardless of
ambient temperature change.  Wouldn't this be a more attractive scenario
than stopping figuring prematurely?

Mel Bartels


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