.mw-parser-output .hidden-begin{box-sizing:border-box;width:100%;padding:5px;border:none;font-size:95%}.mw-parser-output .hidden-title{font-weight:bold;line-height:1.6;text-align:left}.mw-parser-output .hidden-content{text-align:left}You can help expand this article with text translated from
the corresponding article in German. (July 2017) Click [show] for important translation instructions.
View a machine-translated version of the German article.
Machine translation, like
DeepL or
Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia.
Consider
adding a topic to this template: there are already 9,009 articles in the
main category, and specifying|topic= will aid in categorization.
Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article.
You must provide
copyright attribution in the
edit summary accompanying your translation by providing an
interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing German Wikipedia article at [[:de:Ludwig Schupmann]]; see its history for attribution.
You should also add the template ((Translated|de|Ludwig Schupmann)) to the
talk page.
For more guidance, see
Wikipedia:Translation.
Ludwig Ignaz Schupmann (23 January 1851 in Geseke (Westphalia), Germany – 2 October 1920 also in Geseke) was a German professor of architecture and an optical designer. He is principally remembered today for his Medial and Brachymedial telescopes, types of catadioptric reflecting-refracting telescopes with Mangin mirrors that eliminate chromatic aberrations while using common optical glasses. Used in early lunar studies, they are used now in double-star work.
The asteroid 5779 Schupmann is named in his honour.†
Works
Die Medial-Fernrohre - Eine neue Konstruktion für große astronomische Instrumente, Teubner-Verlag, 1899