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2.1m (82") Otto Struve Telescope
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Instruments
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Prime f/3.9 focus
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Argos
- PI Instrument
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Cassegrain f/13.7 focus
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Sandiford Cass Echelle Spectrometer (CE)
Cassegrain Spectrometer (es2)
CCD WHT Camera
Imaging Grism Instrument (IGI)
Photometer (P45)
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Cautions
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2.1m Cautions
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Optical
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Primary Mirror
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diameter:
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2.08m (82")
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focal length:
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8.13m (26.7')
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f-ratio:
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3.90
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field angle:
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63.5 arcmin
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plate scale:
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25.4 arcsec/min
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Cassegrain f/13.7 focus
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focal length:
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28.53m (96.6')
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f-ratio:
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13.65
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field angle:
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20 arcmin
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plate scale:
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7.25 arcsec/mm
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Coudé focus - not presently in use
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focal length:
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47.70m (156.5')
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f-ratio:
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22.9
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plate scale:
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4.3 arcsec/mm
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Mechanical
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Primary Mirror
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weight:
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1900kg (4200 lbs)
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thickness:
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29.8cm (11.75")
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material:
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pyrex
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Telescope Tube
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diameter:
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2.64m (8'8")
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length:
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8.2m (27')
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Telescope
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weight:
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41t (45 tons)
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Bearings
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polar axis:
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ball radial trust bearings
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dec axis:
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taped roller bearings
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Dome
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diameter:
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19m (62')
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weight:
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104t (115 tons)
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Historical
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Construction
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started:
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1933
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completed:
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1939
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Contractor
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design:
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Otto Struve
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telescope:
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Warner and Swasey Co.
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dome:
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Patterson Leitch Co.
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optics:
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C. Lundin
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