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