With the LWP, LWR and SWP cameras, the spectrographs cover the spectral ranges given in Table 2.1. Gaps in wavelength coverage in high dispersion are caused by truncation of the lower orders by the edge of the camera faceplate.
Each spectrograph has two entrance apertures. The small aperture is a circle 3 arc seconds in diameter; the large aperture is a 10 x 20 arc second oval. More precise dimensions are given by Panek (1982a, b) and Crenshaw and Park (1989). The throughput of the small aperture is 50 ± 25 percent, varying from image to image.
|Camera||High Dispersion||Low Dispersion|
|Full Coverage||Partial Coverage|
|SWP||1145-1930 Å||1930-2198 Å||1150-1975 Å|
|LWR||1845-3105 Å||3105-3230 Å||1860-3300 Å|
|LWP||1845-2980 Å||2980-3230 Å||1910-3300 Å|