The CTIO 1.5-meter Cassegrain spectrograph is an ultraviolet transmitting grating
spectrograph which is used at the f/7.5 focus where the scale is 18.1 arcseconds/mm.
It is identical to the 2.1-meter telescope White Cassegrain spectrograph at Kitt Peak
National Observatory and therefore allows one to obtain similar spectrograms in both
hemispheres.

Plate Scale (at f/7.5 focal plane)      18.06 arcsec/mm
Slit Length     25.4 mm, 459.7 arcsec
Collimator Focal Length         766.1 mm
Point source collimated beam diameter   101.6 mm
Collimator-to-Camera Angle      55 degrees
Grating size    127[INVALID_PDS_CHARACTER]152 mm
Camera Focal Length     160 mm
Demagnification         4.788
Plate Scale (at detector)       86.7 arcsec/mm