41" Telescope Optics
Primary Mirror
- Diameter: 41"
- Edge Thickness: 8.9"
- Diameter of Cassegrain Hole: 10"
- Radius of Curvature: 248.7"
- Focal Length: 124.35"
- f/ratio: F/3.04
- Material: Pyrex (0.0798 lbs/in^3)
- Weight: 848 pounds
- Finished in the optical shops of Kitt Peak National Observatory
F/8 Secondary Mirror
- Reinstalled in May of 2000
- Diameter: 14"
- Material: Pyrex
- Edge Thickness: 3"
- Weight: 36.9 pounds
- Back Focal Length = 28.06"
- Distance from Secondary Mirror to Cassegrain Focus: 109.56"
- Separation between Primary and Seconary: 81.5"
- Axial Beam Diameter at Seconary (zero field): 7.99 inches
- Unvignetted beam diameter at Seconardy: 8.97 inches (with 6 inch field of view at the Cassegrain focus)
- Effective Focal Length of the Telescope = 606.83" inches
- Plate Scale of the Primary and Secondary Mirror Combination= unknown
- Apertures Sizes: Unknown
- This secondary was originally designed to facilitated the use of 4x5 inch photographic plates
F/14.84 Secondary Mirror
- Removed in May of 2000
- Stored in Darkroom
- Diameter: 9.25"
- Thickness: 1.53"
- Hyperbolic Surface
- R = 65.17"
- Weight: 8 pounds
- Focal Length = -65.17" / 2
- Separation between Primary and Seconary: 98.44"
- Focal Length of the Telescope = 608.44 inches
- Three Channel Photometer Magnification = 618 X (with a 25mm eyepiece)
- Plate Scale of the Primary and Secondary Mirror Combination= 13.38 arcseconds/millimeter
- Apertures:
54.0,
40.4,
25.8,
18.7,
13.25,
9.52,
6.12 arcseconds
F/25 Secondary Mirror
- Not used after May of 1996
- Unknown storage location (perhaps in darkroom)
- Diameter: 9.25"
- Edge Thickness: 1.5"
- Weight: 8 pounds
- Back Focal Lenght: 205"
- Distance from seconday to front surface of the primary mirror: 94"