Celestron C11-SGT User Manual download pdf (Page 41)

Omni XLT Specifications 39

asTromasTer iTem # 21061 21062 31035 21063 21064 31042 31045 / 31051*

Model Name AstroMaster 70AZ AstroMaster 70EQ AstroMaster 76EQ AstroMaster 90AZ AstroMaster 90EQ AstroMaster 114EQ AstroMaster 130EQ

Optical Design 70 mm (2.8”) refractor 70 mm (2.8”) refractor 76 mm (3”) reflector 90 mm (3.5”) refractor 90 mm (3.5”) refractor 114 mm (4.5”) reflector 130 mm (5”) reflector

Focal Length / Focal Ratio 900 mm / f/13 900 mm / f/13 700 mm / f/9 1000 mm / f/11 1000 mm / f/11 1000 mm / f/9 650 mm / f/5

Finderscope Built-on StarPointer Built-on StarPointer Built-on StarPointer Built-on StarPointer Built-on StarPointer Built-on StarPointer Built-on StarPointer

Mount Altazimuth CG-2 Equatorial CG-2 Equatorial Altazimuth CG-3 Equatorial CG-2 Equatorial CG-3 Equatorial

Eyepiece 20 mm (45x) 20 mm (45x) 20 mm - Erect Image (35x) 20 mm (50x) 20 mm (50x) 20 mm - Erect Image (50x) 20 mm - Erect Image (33x)

Eyepiece 10 mm (90x) 10 mm (90x) 10 mm (70x) 10 mm (100x) 10 mm (100x) 10 mm (100x) 10 mm (65x)

Erect Image Diagonal – 1.25”

Yes Yes n/a Yes Yes n/a n/a

Tripod 1.25” steel tube legs 1.25” steel tube legs 1.25” steel tube legs 1.25” steel tube legs 1.25” steel tube legs 1.25” steel tube legs 1.25” steel tube legs

CD-ROM

TheSkyX TheSkyX TheSkyX TheSkyX TheSkyX TheSkyX TheSkyX

Highest Useful Magnification 165x 165x 180x 213x 213x 269x 306x

Limiting Stellar Magnitude 11.7 11.7 11.9 12.3 12.3 12.8 13.1

Resolution: Rayleigh 1.98 arc seconds 1.98 arc seconds 1.82 arc seconds 1.54 arc seconds 1.54 arc seconds 1.21 arc seconds 1.06 arc seconds

Dawes Limit 1.66 arc seconds 1.66 arc seconds 1.53 arc seconds 1.29 arc seconds 1.29 arc seconds 1.02 arc seconds .89 arc seconds

Light Gathering Power 100x unaided eye 100x unaided eye 118x unaided eye 165x unaided eye 165x unaided eye 265x unaided eye 345x unaided eye

Angular Field of View: 20 mm Eyepiece 1.1º 1.1º 1.4º 1º 1º 1º 1.5º

Linear FOV (

@1000 yds) 58 ft. 58 ft. 75 ft. 53 ft. 53 ft. 53 ft. 79 ft.

Secondary Mirror Obstruction n/a n/a 1” n/a n/a 1.4” 1.7”

Diameter, Area n/a n/a 33%, 11% n/a n/a 31%, 10% 34%, 12%

Optical Coatings Fully-Coated Fully-Coated Aluminum Multi-Coated Multi-Coated Aluminum Aluminum

Optical Tube Length 36 inches 36 inches 26 inches 36 inches 36 inches 20 inches 24 inches

Telescope Weight 18 lbs 18 lbs 16 lbs 20 lbs 27 lbs 17 lbs 28 lbs

*Includes Motor Drive

omni xlT iTem # 21088 21092 21090 21094 31057 11084

Model Name Omni XLT 102 Omni XLT 102ED Omni XLT 120 Omni XLT 150 R Omni XLT 150 Omni XLT 127

Optical Design / Aperture Refractor / 102 mm (4”) Refractor / 102 mm (4”) Refractor / 120 mm (4.7”) Refractor / 150 mm (6”) Newtonian Reflector / 150 mm (6”) Schmidt-Cassegrain / 127 mm (5”)

Optical Features Non-Spherical Aberration Non-Spherical Aberration Non-Spherical Aberration Non-Spherical Aberration Non-Spherical Aberration Non-Spherical Aberration

Focal Length / Focal Ratio 1000 mm / f/10 900 mm / f/9 1000 mm / f/8.3 750 mm / f/5 750 mm / f/5 1250 mm / f/10

Optical Coatings StarBright XLT StarBright XLT StarBright XLT StarBright XLT StarBright XLT StarBright XLT

Focuser 2” with 1-1/4” Adapter 2” with 1-1/4” Adapter 2” with 1-1/4” Adapter 2” with 1-1/4” Adapter 1-1/4” Standard SCT

Finderscope 6x30 6x30 6x30 6x30 6x30 6x30

Star Diagonal – 1.25” Yes Yes Yes Yes n/a Yes

Eyepiece 25 mm LET w/multi-coating 25 mm LET w/multi-coating 25 mm LET w/multi-coating 25 mm LET w/multi-coating 25 mm LET w/multi-coating 25 mm LET w/multi-coating

CD-ROM TheSkyX TheSkyX TheSkyX TheSkyX TheSkyX TheSkyX

Mount Type CG-4 German Equatorial CG-4 German Equatorial CG-4 German Equatorial CG-4 German Equatorial CG-4 German Equatorial CG-4 German Equatorial

Tripod w/bubble level 1.75” Stainless Steel Legs 1.75” Stainless Steel Legs 1.75” Stainless Steel Legs 1.75” Stainless Steel Legs 1.75” Stainless Steel Legs 1.75” Stainless Steel Legs

Counterweights 3.2 kg and 1.8 kg 3.2 kg and 1.8 kg 3.2 kg and 1.8 kg 3.2 kg and 1.8 kg 3.2 kg and 1.8 kg 3.2 kg and 1.8 kg

Highest Useful Magnification 240x 240x 283x 360x 360x 300x

Lowest Useful Magnification 15x 15x 17x 21x 21x 18x

Limiting Stellar Magnitude 12.5 12.5 12.9 13.4 13.4 13.1

Resolution:

Rayleigh 1.36 arc seconds 1.36 arc seconds 1.19 arc seconds 0.92 arc seconds 0.92 arc seconds 1.1 arc seconds

Dawes Limit 1.14 arc seconds 1.14 arc seconds 0.97 arc seconds 0.76 arc seconds 0.76 arc seconds 0.91 arc seconds

Light Gathering Power 212x unaided eye 212x unaided eye 294x unaided eye 459x unaided eye 459x unaided eye 329x unaided eye

Angular Field of View: 25 mm eyepiece 1.25º 1.4º 1.25º 1.67º 1.67º 1.0º

Linear FOV (

@1000 yds) 66 ft. 74 ft. 66 ft. 88 ft. 88 ft. 53 ft.

Secondary Mirror Obstruction n/a n/a n/a n/a 1.75” 1.75”

Diameter, Area n/a n/a n/a n/a 29%, 8.5% 35%, 12%

Optical Tube Length 40 inches 37 inches 40 inches 34 inches 27 inches 11 inches

Telescope Weight 43 lbs 41.5 lbs 46 lbs 49.5 lbs 45.5 lbs 40 lbs

Specifications are subject to change without notice or obligation.

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Celestron C11-SGT User Manual Page 41

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