Princeton Instruments’ Pixis-XB series direct detection cameras are designed for extremely low flux imaging and spectroscopy applications in the x-ray energy range between ~3 and 20 keV. The cameras feature front- and back-illuminated deep-depletion CCDs with formats from 1340 x 400 to 1340 x 1300 pixels. They provide high sensitivity and a high dynamic range. They can run from a laptop computer with the USB 2.0 interface, and full triggering/shutter control capabilities are incorporated, operating at 100 kHz and 2 MHz. The cameras are suited for medium x-ray applications such as photon correlation and intensity fluctuation spectroscopy, diffraction and lithography. They deliver deep cooling to better than —70 °C, achieved via a thermoelectric Peltier system, in a compact package offering ultrahigh vacuum.