Schematics of the setup used from the CHROMIS installation in August 2016 through the 2020 season. Acronyms: FL = field lens, FS = field stop, TM = tip-tilt mirror; DM = deformable mirror; RL = reimaging lens; DC = 500 nm dichroic beamsplitter; DBS = double beamsplitter, CT = correlation tracker; AO WFS = adaptive optics wavefront sensor; WB BS = wide-band beam splitter; FPI = Fabry–Pérot interferometer, LCs = liquid crystal modulators; P BS = polarizing beamsplitter, NB = narrowband, WB = wideband, NBT = NB transmitted, NBR = NB reflected, PD = phase diversity. White light enters the telescope from the top. It is split into a red and a blue beam at ∼500 nm by the DC. Distances and angles do not correspond to the physical setup.