In 2003 Kodak released a new version of the CCD we use in the ST-7XE cameras. The new detector is designated the KAF-0402ME. This CCD has the same array architecture as the KAF-0401E NABG with some improvements. Of greatest significance is the increased quantum efficiency due to the addition of a microlens array over the pixels and the use of MAR coated cover glass. The same kind of improvement has already met with great success in the ST-10XME camera. The peak quantum efficiency for the KAF-0402ME used in all three models of ST-7XME cameras is almost 85%. They are the most sensitive CCD camera in their class. The QE for the blue wavelength of 400 nm is 50% higher than that of the previous KAF-0401E CCD (increased from 30% to 45% absolute QE) and 15% higher in the red spectrum near H-alpha (increased from 72% to nearly 85% absolute peak QE).

High QE KAF-0402ME CCD