GREGOR: Optics redesign and updates from 2018–2020
Lucia Kleint, Thomas Berkefeld, Miguel Esteves, Thomas Sonner, Reiner Volkmer, Karin Gerber, Felix Krämer, Olivier Grassin and Svetlana Berdyugina
A&A, 641 (2020) A27
DOI: https://doi.org/10.1051/0004-6361/202038208
