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20 • Assembling Your CM-1100
Below is pertinent technical information on your Celestron CM-1100 telescope that you
may find useful.
OPTICAL TUBE:OPTICAL TUBE:
OPTICAL TUBE:OPTICAL TUBE:
OPTICAL TUBE:
CM-1100CM-1100
CM-1100CM-1100
CM-1100
CM-1400CM-1400
CM-1400CM-1400
CM-1400
Optical System: Schmidt-Cassegrain Schmidt-Cassegrain
Aperture: 11" (279mm) 14" (356mm)
Focal Length: 2800mm (110.2") 3910mm (153.9")
F/ratio: f/10 f/11
Highest Useful Power Magnification: 660x 840x
Lowest Useful Power Magnification: 42x 50x
Resolution (arc seconds): 0.41 0.33
Photographic Resolution: 200 lines/mm 182 lines/mm
Light Gathering Power: 1593x 2581x
Limiting Visual Magnitude: 14.7 15.3
Near Focus
with eyepiece: 60' 175'
with camera: 60' 225'
Optical Tube Length: 25" 32"
Weight
Optical Tube: 27.5 lbs. 45 lbs.
DEC AXIS:DEC AXIS:
DEC AXIS:DEC AXIS:
DEC AXIS:
• All machined stainless steel and aluminum
• 5.625 diameter precision bronze worm gear, 180 tooth. AGMA quality 10.
• .4375 diameter precision 303 stainless steel worm. AGMA quality 10. Dual
bearing supported.
• One inch diameter solid shaft, centerless ground
• Two 2” preloaded Tapper Roller Bearings, pre-loading the shaft.
• Bearing preload is independent of clutch tension.
• Slip Clutch-Variable friction two knob adjustment
• 5.25” laser engraved setting circle, 1 degree increments.
• 182 oz/in Stepper Motor - .50 arc second steps
• Removable stainless steel counterweight shaft
• Dovetail saddle plate – allowing for interchanging of any tube assembly
• Instrument Weight of 60 Lbs
POLAR AXIS:POLAR AXIS:
POLAR AXIS:POLAR AXIS:
POLAR AXIS:
• All machined stainless steel and aluminum
• 5.625 diameter precision bronze worm gear, 180 tooth. AGMA quality 10.
• .4375 diameter precision 303 stainless steel worm. AGMA quality 10. Dual
bearing supported.
• One inch diameter solid shaft, centerless ground
• Two 2” preloaded Tapper Roller Bearings, pre-loading the shaft.
• Bearing preload is independent of clutch tension.
• Slip Clutch-Variable friction two knob adjustment
• 5.25” driven laser engraved setting circle, 5 minute increments
(Northern Hemisphere only)
• 182 oz/in Stepper Motor - .50 arc second steps
• Latitude adjustment 20 to 65 degrees with counterweights. Total travel is 13 to
65 degrees.
• Azimuth adjustment, bi-directional +/- 7 degrees
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