Re: [APML] Well corrected Newtonian, was[Vacuum Pump]

["Bobby Middleton" <bobm@koyote.com>]

----- Original Message -----
From: <Aplanatic@aol.com>

> With the corrector, both designs have a focal ratio of about f/5.1.
Taking
> as losses the big secondary (12%), the primary mirror's reflective losses
> (12%), the secondary mirror's losses (8%) and the losses in the coated
> corrector (4%), the transmission ratio (t-stop) will be about f/6.2.  The
> focal length will be about 2070 mm.

At 4 x 4 you'd be able to frame the entire Andromeda galaxy.
<VBG>

Thanks for the details Dave. We'll wait with eagar anticipation.
Bobby Middleton






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