[AZ-Observing] Re: Southern Milkyway with Sigma fisheye

Tom, I did measure 21.6 on four consecutive nights, but at 2am one morning I 
got 21.9.  So it varies apparently.

Chris


--- On Mon, 9/15/08, Tom Polakis <tpolakis@xxxxxxx> wrote:

> From: Tom Polakis <tpolakis@xxxxxxx>
> Subject: [AZ-Observing] Re: Southern Milkyway with Sigma fisheye
> To: az-observing@xxxxxxxxxxxxx
> Date: Monday, September 15, 2008, 10:33 AM
> ---- Chris Schur <comets133@xxxxxxxxx> wrote: 
> 
> > sigma 8mm f/3.5 fisheye lens pointed at the zenith...
> 
> Chris, nice shot.  That fisheye is really sharp at f/5.0! 
> Your image shows the North America Nebula and Eta Carinae in
> one frame.
> 
>  
> > The sky was fairly dark in the Outback, reading 21.6
> on the SQM meter in a bland part of the sky.
> 
> Since there was no source of light pollution down to the
> horizon, I wonder why the reading wasn't closer to 22.0.
>  Was the reading affected by the presence of the Milky Way. 
> I thought that people have read 21.6 from their SQM's at
> Five Mile Meadow, which is dark, but it ain't the
> Outback.
> 
> Tom
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