Ernostar

Ultrastigmat (Minor, 1916, per US 1,360,667) Ernostar f/2.0 (Bertele, 1923, per US 1,584,271) Ernostar f/2.0 (Bertele, 1924, per DRP 458,499) Sonnar

lens suitable for candid available light photography was the Ernemann Ernostar (Germany) of 1923. Ludwig Bertele's formula was originally a 10 cm f/2

plate or cut, sheet, film camera called the Ermanox, fitted with an f/1.8 Ernostar lens. The Ermanox was introduced by the Ernemann-Werke (Works) of Dresden

optics.: 34  In the same year, Bertele would begin the development of the Ernostar [de] design. Its basis was the optical scheme of the Ultrastigmat cinema

significant designers was the ex-Ernemann man Dr Ludwig Bertele, famed for his Ernostar high-speed lens. With the advent of the Contax by Zeiss-Ikon, the first