This first-order Fresnel Lens is at High Street Landing in Portsmouth Virginia. It began service in 1896 as part of the Hog Island Light off the Great Machipongo Inlet on Virginia's Eastern Shore. This type of lens was invented in 1822 by French physicist Augustin Fresnel. Rather than merely reflecting light, it used hundreds of prisms to bend and concentrate the light in a powerful beam. Canon 40D, 1/3200 sec at F/4.0, ISO 160, focal length 75mm.
From 365 Project The Air Force Memorial in glows against low hanging clouds and mist. Located on a promontory in Arlington, Virginia, overlooking the Pentagon and adjacent to Arlington Cemetery, the memorial's three 270 feet tall stainless arcs evoke the spirit of flight. Taken with a Canon 40D, 5.0s exposure at f/8.0, ISO 200, 28mm equivalent focal length, mounted on a tripod.
This is a reproduction on an early 20th Century "squirrel cage" carbon filament light bulb built by Thomas Edison. In today's modern reproductions the filaments are made of tungsten, which burns three times brighter than the original carbon filament versions. They are really getting popular in vintage bare blub fixtures. This one was hanging over my table at Tarrant's Cafe , 1 W. Broad Street in Richmond Virginia. Canon G15, 1/15 sec @ f/8.0, ISO 200, in macro mode.