Celestron 91525, 11055, 11065 instruction manual Technical Specifications

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Technical Specifications

Below is pertinent technical information on your Celestron CM-1100 telescope that you may find useful.

OPTICALTUBE:	CM-1100	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.

DECAXIS:

•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

POLARAXIS:

•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

20 • Assembling Your CM-1100

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Contents Page E C e l e s t r o n C M- 11 00/1400 B L E O F C O N T E N T S Iv Table of Contents T R O D U C T I O N How to Use This Manual Word of Caution Schmidt-Cassegrain Optical System S E M B L I N G Y O U R C M 1 1 0 Unpacking Your Celestron CM-1100CM-1100 Setting Up the Tripod Attaching the Center Leg Brace Attaching the Central Column Central Column Electronics Console Center Leg BraceAttaching the Equatorial Mount Installing Counterweight Bar Installing CounterweightAttaching the Optical Tube to the Mount Attaching the Visual Back Installing the Star Diagonal Assembling Your CM-1100 Installing the Finder Installing the Polar Finder Moving the Telescope in R.A. and DEC Adjusting the Mount Balancing the Mount in R.A Balancing the Mount in DEC Assembling Your CM-1100 Technical Specifications Tripod L E S C O P E B a S I C S Image OrientationFocusing General Photography Hints Aligning the Finder Your First Look Daytime ObservingNighttime Observing Calculating Magnification Determining Field of View T R O N O M Y B a S I C S Celestial Coordinate SystemMotion of the Stars Polar Alignment DefinitionFinding the Pole Latitude Scales Pointing at Polaris Polar Axis Finder Declination Drift Aligning the R.A. Setting Circle Setting the DEC Circle Powering Up the Drive I N G T H E D R I V EGuide Speed Periodic Error Correc- tion BC Backlash CorrectionHC/CCD Northern/Southern Hemisphere Operation Hand ControllerDEC Reverse AutoguidingL E S T I a L O B S E R V I N G Observing the MoonObserving the Sun Using Your Setting Circles Observing Deep-Sky ObjectsStar Hopping Celestial Observing Viewing Conditions TransparencySky Illumination Seeing ConditionsCelestial Observing L E S T I a L P H O T O G R a P H Y Lunar Phase ISO Crescent Quarter Short Exposure Prime FocusFull Celestial Photography Piggyback Celestial Photography Eyepiece Projection Planet ISO Moon Mercury Venus Mars Jupiter Saturn Long Exposure Prime Focus Celestial Photography CCD Imaging Fastar Configuration Description of F-numbersImaging at f/7 Imaging at f/11 Medium size to small galaxiesLunar or small planetary nebulae Imaging at f/22 Planetary or LunarCare and Cleaning of the Optics Collimation L E S C O P E M a I N T E N a N C ETelescope Maintenance Telescope Maintenance T I O N a L a C C E S S O R I E S Optional Accessories Optional Accessories Optional Accessories Const Mag Type Proper NameNGC# Spiral Galaxy Epoch Star Name Constellation MagnitudeAstronomy Texts AtlasesGeneral Observational Astronomy Visual ObservationCelestron ONE Year Warranty