- Cameras (Debye, Gandolfi, Guinier)
    Low cost advantage
    Guinier cameras  : FWHM  0.06° or 0.08° (2-theta)
 

- Commercial diffractometers
    Bragg-Brentano 90%
    Seeman-Bohlin 10%
    Current performances : Bragg-Brentano : FWHM  0.04° (2-theta)