40 inch Refractor by MacPurity

MacPurity | all galleries >> Galleries >> Astro Stuff > 40 inch Refractor

$40 inch Refractor$
16-Apr-2016	John Robbins

General view of the pier and telescope at Yerkes Observatory, Williams Bay, Wisconsin.

Nikon D810 ,Sigma 15-30mm f/3.5-4.5 EX DG ASP
1/160s f/4.0 at 22.0mm iso5000 full exif

other sizes: small medium large original auto

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