https://www.astronomy.com/observing/orion-eon-80mm-ed-apochromatic-refractor-telescope/
Orion EON 80mm ED Apochromatic Refractor Telescope | Astronomy.com
May 18, 2023 - categories:Human Spaceflight, Telescopes and Equipment | tags:Human Spaceflight, Telescopes
refractor telescopeorioneonedapochromatic
https://everything2.com/title/Apochromatic
Apochromatic
apochromatic
https://www.wordnik.com/words/apochromatic
apochromatic - definition and meaning
apochromatic: Corrected for both chromatic and spherical aberration, as a lens.
apochromaticdefinitionmeaning