Fan Mountain Observatory: 40-inch Astrometric Reflector - Specs

Fan Mountain 40-inch Astrometric Reflector

General System Data: Baker-Schimdt system

Effective focal ratio - f / 13.534

Effective focal length - 541.3764 inches (13.75096 meters)

View Optical layout

Focal Plane:
Cassegrain focus - Photographic Plates

Field Diameter - 8 inches
Angular Field Diameter - 50.8 arcmin
Plate Scale - 15.000 arcsec/mm

Focal Plane:
Cassegrain focus - SITe 2048 x 2048 CCD

Field Diameter - 2 inches
Angular Field Diameter - 12.3 arcmin
Plate Scale - 0.36 arcsec/pixel
Filter wheel 1 - 3 x 6" filters (Washington + DDO51)
Filter wheel 2 - 5 x 4" filters (UBVRI and H alpha + cont.)