Washburn telescope lens cleaning
Photo by UW-Madison, University Communications
© Board of Regents of the University of Wisconsin System
File ID: 15044
File name: Washburn_lens_clean12_9168.jpg
File type: NIKON D3
Caption: John Augustine, an antique-optics restoration specialist, inspects the 15.5-inch refractor lens that was removed from the Washburn Observatory telescope -- which is temporarily suspended upside down -- at the University of Wisconsin-Madison on May 7, 2012. Augustine will spend several days disassembling and cleaning the achromatic doublet lens, an assembly that weighs an estimated 50 pounds, using a series of distilled water baths and small brushes to free the elements of accumulated dust, debris and the occasional mud wasps' nest. TThe once-in-fifty-year refurbishment will conclude with reinstallation and collimating of the telescope's primary lens. (Photo by Jeff Miller/UW-Madison)
Photo by: Jeff Miller
Date: 2012
Specs: NIKON D3, f/2.8, 1/125, 50.0 mm