The Boller & Chivens fast uv-transmitting image tube spectrograph was
used at the f/10 focus of the 1.0m telescope.

Plate Scale (at f/10 focal plane)      19.5 arcsec/mm
Slit Length     19mm mm, 370 arcsec
Collimator Focal Length         900 mm
Point source collimated beam diameter   90 mm
Collimator-to-Camera Angle      49 degrees
Grating size    128[INVALID_PDS_CHARACTER]102 mm
Camera Focal Length     140 mm
Demagnification         6.455
Plate Scale (at detector)     125 arcsec/mm

The 2D-Frutti was a two-dimensional photon counting detector, originally developed by
Steve Shectman then of the Mt Wilson and Las Campanas Observatories. The sensitivity
of this detector is determined by the S-20 photocathode of the Carnegie image tube
which provides the first intensification stage.  This peaks at ~ 4200A, declining
slowly toward the red, so that 7300A can be taken as its red limit.  In the UV, the
2D-Frutti was sensitive down to the atmospheric cutoff (3200A).  The 2D-Frutti
offered a format up to 1.5-M pixels, zero readout noise, and low dark current ( < 1
count/pixel/hour for 1x1 binning). Conversely the 2D-Frutti could be irreversibly
damaged by over illumination and count rates must be further limited to typically < 1
cts/pixel/second, because of coincidence losses. Even with these precautions, the
2D-Frutti was not really all that linear.