Euler E359: Construction of objectives composed of two different kinds of glass which produce no confusion, either from their aperture or from the different refrangibility of the rays, with the most advantageous manner of making telescopes from them | English translation | OMH v1.0

English translation of “Construction des objectifs composés de deux différentes sortes de verre qui ne produisent aucune confusion, ni par leur ouverture, ni par la différente réfrangibilité des rayons, avec la manière la plus avantageuse d’en faire des lunettes” by Leonhard Euler (Eneström E359), titled “Construction of objectives composed of two different kinds of glass which produce no confusion, either from their aperture or from the different refrangibility of the rays, with the most advantageous manner of making telescopes from them.” Prepared for Open Math Heritage with OpenAI-assisted translation, mathematical transcription and LaTeX typesetting. OMH v1.0 is a machine-assisted draft that has undergone a full, fresh AI-assisted technical audit of source coverage, translation, formulas, tables and figures where present, and rendered output. This is not a claim of human scholarly review or certification of the historical mathematics. Version 2 is reserved for a fully reviewed edition. Original publication: Mémoires de l’Académie royale des sciences et belles-lettres de Berlin, vol. 22 (year 1766, printed 1768), pp. 119–170, figures 1–8 on two shared plates. Sources: https://scholarlycommons.pacific.edu/euler-works/359/; https://bibliothek.bbaw.de/digitalisierte-sammlungen/akademieschriften. Reproduced BBAW scan assets retain the collection’s stated current CC BY-SA conditions and attribution; no unsupported numbered license version or blanket license for the mixed-content edition is asserted. The original historical text is public domain by age; no publication license is assigned here to the new translation or editorial notes.