File:KoppCircularWalk Obverse Full.JPG
KoppCircularWalk_Obverse_Full.JPG (500 × 490 pixels, file size: 48 KB, MIME type: image/jpeg)
Front view of a circular Kopp walk lens lit by a 40 Watt bulb in an Eaglelux Tall Fin
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|current||19:45, 28 May 2016||500 × 490 (48 KB)||SchoolcraftSignal||Front view of a circular Kopp walk lens lit by a 40 Watt bulb in an Eaglelux Tall Fin|
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