As such, it is appropriate for use as a portrait lens. In 1841, the Petzval Portrait Lens was introduced. In 1840, he designed his famous portrait lens. The Petzval Portrait was the dominant portrait lens for nearly a century. For more formal portraits, however, he used an 85mm portrait lens and Kodachrome film. The first dedicated portrait lens was the Petzval lens developed in 1840 by Joseph Petzval. The OneStep+ has an additional portrait lens, with minimum focusing distance of 30 cm.