[ATMoB-discuss] All-Sky Mirrors

[Paul Valleli]

For anyone interested in the mirrors for an all-sky camera that I 
exhibited at Stellafane,
  I obtained mine from Global Industrial Supply.
Web site:

http://www.globalindustiral.com

I used the 18-inch diameter outdoor acrylic version @ 37.75 
USD.  26-inch and 36-inch diam. versions are also available.
See page 244 of their catalog.

Glass ones are also available.

The application to astronomical photography is discussed in S&T 
several years ago but I have forgotten which issue.
It helps to shoot from a distance with a telephoto lens as the large 
lens records fainter stars and the
reflection of the camera can be quite small.
Dark Skies,
Paul