... DXF drawings of the spectrographs* . also available via anonymous ftp to ftp.apo.nmsu.edu. If connecting via WWW, save files as documents; dxf files make dull reading! There are two identical spectrographs, both permanently mounted to the back of the 2.5m telescope. Using a red and blue camera, the spectral range is 3900-9100 Angstroms with a resolution of 2000. ... Each spectrograph is fed with 320 optical fibers, which are all-silica UV-enhanced with 180 micron diameter cores. ...