CIAO cryostat: 3D CAD drawing depicts the CIAO cryostat with its cold optics and actuators. The movable field lens, which is located behind the entrance window, controls the lateral pupil position (Dai et al. 2017) as seen by the lenslet array. The achromatic lenses image the deformable mirror (pupil) onto the lenslet array. The filter wheel houses an H + K-band filter, two neutral density filters, a closed position, and an open position.