Refractor Wide View by MacPurity

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$Refractor Wide View$
16-Apr-2016	John Robbins

Wide angle view of the 40 inch refractor at Yerkes Observatory, Williams Bay, Wisconsin.

Nikon D810 ,Sigma 15-30mm f/3.5-4.5 EX DG ASP
1/200s f/3.5 at 16.0mm iso5000 full exif

other sizes: small medium large original auto

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