Danish photographer Jonas Krøyer took the lens, shutter, rail and bellows from a vintage Zeiss Ikon Ikonette folding camera (manufactured from 1929 to 1931) and turned it into a DSLR lens. After detaching the bellows from the camera body, Krøyer made an adapter that allows the lens to be mounted on any Nikon SLR. The original shutter is kept open continuously with the help of a spring from a ballpoint pen, so it’s the camera’s own shutter that controls exposure time. The lens offers three aperture settings, f/9, f/16 and f/32. Focusing is done by sliding the lens back and forth on the rail, as typical of a bellows lens. For more information and a selection of sample images, head to the photographer’s website.

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