Three compact, grating spectrographs have been designed and constructed: a high-speed <i>f</i>/0.87 spectrograph, an <i>f</i>/6.8 larger dispersion spectrograph, and an ultraviolet spectrograph with quartz optics. All use commercially available lenses and 4×5 in. camera backs. Resolution of better than 2 Å is attainable with all three instruments.
D. M. Mann and S. E. Johnson, "Modifications of the Bass–Kessler Spectrograph," Appl. Spectrosc. 23, 370-371 (1969)