In 1840, Joseph Petzval invented the optical system of the lens, which was used for portrait shots before the end of the century. On the kickstarter project was presented in which this ancient design has received a second life. The lens is made in the authentic style, made of brass and weighs about a pound. The maximum aperture is f/2.2. The first thousand lenses will be available until the end of the year at a price of $ 500.
Read another very interesting article about alternative energy of the Sun, water and air.
