Ernostar
The Ernemann Anastigmat "Ernostar" is one of the most famous lenses in the history of photography. In 1922 several versions of the patent were applied for. The lens was used from 1924 on the Ermanox camera manufactured by the Ernemann works in Dresden . With a light intensity of 1: 2, later 1: 1.8, it was the fastest mass-produced photographic lens in the world. The combination of Ermanox / Ernostar made it possible for the first time to work under lighting conditions that were previously not technically manageable, e.g. B. indoors, at night or during concerts. The mastery in dealing with these new photographic possibilities contributed z. B. to the fame of the photographer Erich Salomon .
The word mark “Ernostar” was registered on January 8, 1923 and only deleted on January 20, 2004 at the request of the last owner, Ernemann Cine Tec Kinoprojektionsgeräte GmbH .
construction
The basic construction of the Ernostar is based on the Cooke triplet , a three- lens anastigmatic . CM Minor from Chicago first came up with the idea of inserting a converging lens between the central diverging lens of the triplet and the front lens in 1916 . This resulted in the Ultrastigmat produced by Gundlach as a lens for film cameras .
In the years that followed, Ludwig Bertele experimented with different variants, in which he alternately replaced the second front lens and the central diverging lens (DRP 401275, 1922), both front lenses (DRP 401274, 1923) or just the diverging lens with a doublet (DRP 428657 , 1925). The basic type patented in 1924 (DRP 458499; see illustration) follows the Ultrastigmat in the lens scheme.
An Ernostar 1: 2/100 mm was mostly used on the Ermanox (4.5x6 cm medium format camera ). The light intensity of the Ernostar was soon further improved to 1: 1.8.
Construction-like lenses
Other similarly constructed lenses are the Leitz Elmarit 90 mm f / 2.8 or the Minolta MC Tele Rokkor -QD 135 mm f / 3.5.
The Primoplan from Meyer-Optik is a further development of the Ernostar.
Web links
Individual evidence
- ↑ Information from the trademark register , accessed on July 13, 2011
- ^ Website Taunusreiter.de about early fast lenses, accessed on January 16, 2010