2 Free Photos of Fifth Order Fresnel Lenses

cc-zerofiles uploaded by daderotinteriors of lighthouses in the united statesjones point lighthouseexhibits in the lyceum (alexandria, virginia)
Fresnel lens, 5th order, used in Jones Point lighthouse, 1800s - The Lyceum - Alexandria, Virginia - DSC03500
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Fresnel lens, 4th order, used in Jones Point light tower, 1926 - The Lyceum - Alexandria, Virginia - DSC03495
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