Keywords: Ferndale CA Cape Mendocino Fresnel Lens.jpg en View of the original Fresnel Lens from the Cape Mendocino Lighthouse is displayed in a full-scale replica of the lighthouse at the Humboldt County Fairgrounds Original Photograph User Ellin Beltz 2005-04-07 First order fresnel lenses Cape Mendocino Lighthouse Humboldt County FairgroundsPhotographs by Ellin Beltz |