2/2 This flat elliptical mirror measures 2.7 by 2.2 metres. It's the largest tip-tilt mirror in the world: it will move without bending about 10 times per second.
It will work together with the M4, a very fast deformable mirror, to correct perturbations caused by the telescope mechanisms, the wind and atmospheric turbulence.
More details here: https://www.eso.org/public/announcements/ann24008/