[sac-forum] Re: [sac-forum] Re: Étendues Big and Small

No, David, I'm not going to follow your lead.

Tom

---- "david.fredericksen" <david.fredericksen@xxxxxxxxxxxxxxxxxxx> wrote: 
> Tom,
>     Are you thinking of upgrading to something similar?  Just curious.
> 
> Clear Skies,
> David
> 
> Tom Polakis wrote:
> 
> >At last night's meeting, we learned that Large Scale Synoptic Survey has a 
> >large Étendue, which is defined as the telescope's light gathering area 
> >multiplied by the field of view.  The Étendue for the LSST is 319 m^2 deg^2. 
> > 
> >I became curious what the Étendue is for my 10" and Philips ToUCam when it's 
> >at the same image scale of 0.2" per pixel.  I calculate 0.0000480 m^2 deg^2. 
> > 
> >The Étendue of the LSST will be 6.6 million times larger than my backyard 
> >setup. 
> > 
> >Tom
> >
> >  
> >
>

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