Memo to Observers
See:
Observing Support: 2.1 m Telescope
Instruments
Prime f/3.9 focus
Pending (ProEM)
Cassegrain f/13.7 focus
Sandiford Cass Echelle Spectrometer (SES)
CCD WHT Camera - Cassegrain f/13.7 focus
Optical
| Primary Mirror | |
| Diameter | 2.08 m (82") |
| Focal length | 8.13 m (26.7') |
| F-ratio | 3.90 |
| Field angle | 63.5 arcmin |
| Plate scale | 25.4 arcsec/mm |
| Cassegrain f/13.7 focus | |
| Focal length | 23.91 m (78.4') |
| F-ratio | 8.8 |
| Field of view | 61.5 arcmin |
| Plate scale | 8.62 arcsec/mm |
| Cassegrain f/17.7 focus | |
| Focal length | 28.53 m (96.6') |
| F-ratio | 13.65 |
| Field angle | 20 arcmin |
| Plate scale | 7.25 arcsec/mm |
| Coudé focus - not presently in use | |
| Focal length | 47.70 m (156.5') |
| F-ratio | 22.9 |
| Plate scale | 4.3 arcsec/mm |
Mechanical
| Primary Mirror | |
| Weight | 1900 kg (4200 lbs) |
| Thickness | 29.8 cm (11.75") |
| Material | pyrex |
| Telescope Tube | |
| Diameter | 2.64 m (8'8") |
| Length | 8.2 m (27') |
| Telescope | |
| Weight | 41 t (45 tons) |
| Bearings | |
| Polar axis | ball radial thrust bearings |
| Dec axis | taped roller bearings |
| Dome | |
| Diameter | 19 m (62') |
| Weight | 104 t (115 tons) |
Historical
| Construction | |
| Started | 1933 |
| Completed | 1939 |
| Contractor | |
| Design | Otto Struve |
| Telescope | Warner and Swasey Co. |
| Dome | Patterson Leitch Co. |
| Optics | C. Lundin |
