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Telescopio Rifrattore Carl Zeiss, Obiettivo D. 92mm F/16 Doppietto Fraunhofer (fine 800) - Unitronitalia
![7 Fraunhofer telescope of the Berlin Observatory (identical to the one... | Download Scientific Diagram 7 Fraunhofer telescope of the Berlin Observatory (identical to the one... | Download Scientific Diagram](https://www.researchgate.net/publication/353922250/figure/fig6/AS:1057282439794688@1629087185719/Fraunhofer-telescope-of-the-Berlin-Observatory-identical-to-the-one-at-the-Dorpat.png)
7 Fraunhofer telescope of the Berlin Observatory (identical to the one... | Download Scientific Diagram
![The equatorial of the expedition was the first American telescope of... | Download Scientific Diagram The equatorial of the expedition was the first American telescope of... | Download Scientific Diagram](https://www.researchgate.net/publication/260527437/figure/fig3/AS:654782855401485@1533123806790/The-equatorial-of-the-expedition-was-the-first-American-telescope-of-considerable-size.png)
The equatorial of the expedition was the first American telescope of... | Download Scientific Diagram
![An engraving depicting a refracting telescope built by Joseph von Fraunhofer (1787-1826) a German physicist. Dated 19th Century Stock Photo - Alamy An engraving depicting a refracting telescope built by Joseph von Fraunhofer (1787-1826) a German physicist. Dated 19th Century Stock Photo - Alamy](https://c8.alamy.com/comp/RJJXGJ/an-engraving-depicting-a-refracting-telescope-built-by-joseph-von-fraunhofer-1787-1826-a-german-physicist-dated-19th-century-RJJXGJ.jpg)