The DESI Sky Continuum Monitor System tracks the night sky brightness to dynamically adjust exposure times to maximize DESI observing efficiency.
The LBT f/15 Rigid Secondary Mirror enabled the LBT's MODS and LUCI facility instruments to get on sky before the adaptive secondary mirrors arrived.
The LBT Primary Mirror Aluminization system is used to put a fresh aluminum coating on the LBT's 8.4-meter diameter primary mirrors.