NAYUTA's visual observation apparatus is capable of imaging objects up to 1.5 billion light years away. How, then, one may wonder, is it possible to observe objects that are farther than that? In the case of NAYUTA, a cooled visible CCD camera is attached to the Cassegrain focus. CCD, or Charge Coupled Device, is a sensitive electronic device that converts light into electronic signals. Although it is commonly applied as an imaging sensor for digital still cameras, its high sensitivity and low noise performance make it ideal for capturing high-quality astronomical images.

The CCD camera mounted on NAYUTA has been cooled so that it produces even less noise than general CCD cameras. With the use of this cooled CCD camera, it is theoretically possible to capture images of celestial objects at the ultimate limits of space, more than 15 billion light years away.