{"id":417,"count":28,"description":"\"\"\r\n\r\nErnst Leitz I (1843-1920)<\/strong>\r\n\r\nWhen Leitz joined Carl Kellner\u2019s Optical Institute in Wetzlar 1864, he was an instrument maker trained in making physical and chemical apparatus, and also had several years experience making Swiss watches. After Kellner\u2019s death in 1855, Leitz became the main shareholder in the company. By 1869, he owned it outright and continued in business under his own name. He introduced serial production and sales increased rapidly after 1871. They sold their 10,000 microscope in 1887, and in 1907, Robert Koch took delivery of the 100,000th<\/sup>. Paul Erlich received the 150,000th<\/sup>.\r\nThe First World War had severe economic consequences for the company. Ernst Leitz I died in 1920, and the company passed to his 2nd<\/sup> son, Ernst Leitz II.\r\n\r\n \r\n\r\nErnst Leitz II (1871-1956)<\/strong>\r\n\r\nLeitz II revolutionised photography by expanding the company\u2019s product range to include portable cameras under the name Leica (an abbreviation of Lei(tz) ca(mera)). He launched the Leica 0, a combination of designs by 2 of his employees, in 1925. Oskar Barnack designed a camera that used 35mm film and Max Berek was responsible for the lenses.\r\nThe company also produced other instruments in the 1920s and 1930s, including polarising and fluorescent microscopes.\r\nIn recent years, it has become known that during World War II, Leitz helped some of his Jewish employees reached the USA and protected others. Many of his employees were Ukrainian complex forced by the Nazi regime were treated well by Leitz and his daughter (for which she was sent to\u00a0 a prison camp), and it is also claimed that he saved over 1000 Polish Jews by employing them in his enamel factory in Krak\u00f3w. He resisted all efforts to publicise its activities after the war.\r\nWhen he died, control of the company passed to his sons Ernst Leitz III, Ludwig and Gunther.","link":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/leitz-en\/","name":"LEITZ","slug":"leitz-en","taxonomy":"category","parent":0,"meta":[],"acf":[],"yoast_head":"\nLEITZ Archieven - Stichting voor Historische Microscopie<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/leitz-en\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LEITZ Archieven - Stichting voor Historische Microscopie\" \/>\n<meta property=\"og:description\" content=\"Ernst Leitz I (1843-1920) When Leitz joined Carl Kellner\u2019s Optical Institute in Wetzlar 1864, he was an instrument maker trained in making physical and chemical apparatus, and also had several years experience making Swiss watches. After Kellner\u2019s death in 1855, Leitz became the main shareholder in the company. By 1869, he owned it outright and continued in business under his own name. He introduced serial production and sales increased rapidly after 1871. They sold their 10,000 microscope in 1887, and in 1907, Robert Koch took delivery of the 100,000th. Paul Erlich received the 150,000th. The First World War had severe economic consequences for the company. Ernst Leitz I died in 1920, and the company passed to his 2nd son, Ernst Leitz II.   Ernst Leitz II (1871-1956) Leitz II revolutionised photography by expanding the company\u2019s product range to include portable cameras under the name Leica (an abbreviation of Lei(tz) ca(mera)). He launched the Leica 0, a combination of designs by 2 of his employees, in 1925. Oskar Barnack designed a camera that used 35mm film and Max Berek was responsible for the lenses. The company also produced other instruments in the 1920s and 1930s, including polarising and fluorescent microscopes. In recent years, it has become known that during World War II, Leitz helped some of his Jewish employees reached the USA and protected others. Many of his employees were Ukrainian complex forced by the Nazi regime were treated well by Leitz and his daughter (for which she was sent to\u00a0 a prison camp), and it is also claimed that he saved over 1000 Polish Jews by employing them in his enamel factory in Krak\u00f3w. He resisted all efforts to publicise its activities after the war. When he died, control of the company passed to his sons Ernst Leitz III, Ludwig and Gunther.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/leitz-en\/\" \/>\n<meta property=\"og:site_name\" content=\"Stichting voor Historische Microscopie\" \/>\n<meta property=\"og:image\" content=\"https:\/\/stichtinghistorischemicroscopie.nl\/wp-content\/uploads\/2016\/06\/Leitz-Ernst_figure.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"CollectionPage\",\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/leitz-en\/\",\"url\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/leitz-en\/\",\"name\":\"LEITZ Archieven - Stichting voor Historische Microscopie\",\"isPartOf\":{\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/#website\"},\"breadcrumb\":{\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/leitz-en\/#breadcrumb\"},\"inLanguage\":\"en-US\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/leitz-en\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"LEITZ\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/#website\",\"url\":\"https:\/\/stichtinghistorischemicroscopie.nl\/\",\"name\":\"Stichting voor Historische Microscopie\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/stichtinghistorischemicroscopie.nl\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"LEITZ Archieven - Stichting voor Historische Microscopie","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/leitz-en\/","og_locale":"en_US","og_type":"article","og_title":"LEITZ Archieven - Stichting voor Historische Microscopie","og_description":"Ernst Leitz I (1843-1920) When Leitz joined Carl Kellner\u2019s Optical Institute in Wetzlar 1864, he was an instrument maker trained in making physical and chemical apparatus, and also had several years experience making Swiss watches. After Kellner\u2019s death in 1855, Leitz became the main shareholder in the company. By 1869, he owned it outright and continued in business under his own name. He introduced serial production and sales increased rapidly after 1871. They sold their 10,000 microscope in 1887, and in 1907, Robert Koch took delivery of the 100,000th. Paul Erlich received the 150,000th. The First World War had severe economic consequences for the company. Ernst Leitz I died in 1920, and the company passed to his 2nd son, Ernst Leitz II.   Ernst Leitz II (1871-1956) Leitz II revolutionised photography by expanding the company\u2019s product range to include portable cameras under the name Leica (an abbreviation of Lei(tz) ca(mera)). He launched the Leica 0, a combination of designs by 2 of his employees, in 1925. Oskar Barnack designed a camera that used 35mm film and Max Berek was responsible for the lenses. The company also produced other instruments in the 1920s and 1930s, including polarising and fluorescent microscopes. In recent years, it has become known that during World War II, Leitz helped some of his Jewish employees reached the USA and protected others. Many of his employees were Ukrainian complex forced by the Nazi regime were treated well by Leitz and his daughter (for which she was sent to\u00a0 a prison camp), and it is also claimed that he saved over 1000 Polish Jews by employing them in his enamel factory in Krak\u00f3w. He resisted all efforts to publicise its activities after the war. 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