2.1 m (82") Otto Struve Telescope

See:
Observing Support: 2.1 m Telescope

• 2.1 m Cautions

Instruments

Prime f/3.9 focus

Argos

Cassegrain f/13.7 focus

Sandiford Cass Echelle Spectrometer (SES)

Cassegrain Spectrometer (es2)

CCD WHT Camera

Imaging Grism Instrument (IGI)

CQUEAN

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	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