Telescope Specifications

Location:  35 05 48.6N 111 32 09.3 W
Altitude: 7236 ft (2206 m)
Optical Design: Cassegrain
Mount Design: English equatorial
Primary Diameter: 72 in (1.83 m)
Central Obscuration Diameter: 17 in (0.43 m)
Primary Material: Schott Duran-50 low expansion glass
Primary Coating: Aluminum (~1000 Angstroms)
Primary Conic Constant: -1.0 (parabola)
Primary Focal Length: 300.6 in (7.64 m)
Primary F/#: 4.18
Secondary Material: Quartz
Secondary Coating: Aluminum (~1000 Angstroms)
Secondary Conic Constant: -2.65 (hyperbola)
F/# at Cassegrain Focus: 17.5
Effective Focal Length at Native Cassegrain Focus: 1256.5 in (31.92 m)
Plate Scale at Native Cassegrain Focus: 6.45 arc seconds/mm
Guiding: Articulated off-axis pick-off mirror and camera