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| PMAS parameters at Calar Alto | |
| primary mirror diameter | 3.5m |
| focal station | cassegrain |
| principle of operation | lensarray + fiber-coupled spectrograph |
| spectrograph type | fully refractive f/3 collimator and f/1.5 camera |
| wavelength range | 350-900nm (CaF2 optics) |
| gratings | 1200, 600 and 300 gr/mm reflective gratings |
| linear dispersion | approx. 0.35, 0.8, and 1.7 A/pixel, respectively |
| current detector size | 2048 x 4096, 15 micron pixels, 2048 pixels spectral |
| detector upgrade (Q4-2002) | 2x 2048 x 4096 mosaic, 4096 pixels spectral |
| standard field size | 16 x 16 square elements (8''x8'') |
| spatial sampling | 0.5''x0.5'' per lens |