Fan Mountain 31-inch Tinsley Reflector

General System Data: Classical Cassegrain system

Effective focal ratio - f / 15.484

Effective focal length - 480.0 inches (12.192 meters)

View Optical layout

Focal Plane:
Cassegrain focus - Eyepiece
    Field Diameter - 5.5 inches
    Angular Field Diameter - 39.4 arcmin
    Plate Scale - 16.92 arcsec/mm
Focal Plane:
Cassegrain focus - FanCam
    Field Diameter - 1.215 inch square
    Angular Field Diameter - 8.7 arcmin square
    Plate Scale - 0.5098 arcsec/pixel
    Filter wheel 1 -
      2Mass Prototype J, H, Ks, H2, FanCam Br-γ,
      Y(to be installed), Low Resolution Prism(to be installed)
    Filter wheel 2 -
      2Mass Prototype K, FanCam FE-II, Pa-β, Polarizer 1, Polarizer 2, Medium Resolution Grism(to be installed),
      High Resolution Grism(to be installed)