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 |