Celestron C11-SGT User Manual download pdf (Page 42)

40 NexStar SLT Specifications

NexStar SLT Item # 22087 22097 22096 31145

Model Name NexStar 90 SLT NexStar 127 SLT NexStar 102 SLT NexStar 130 SLT

Optical Design / Aperture Maksutov-Cassegrain / 90 mm (3.5”) Maksutov-Cassegrain / 127 mm (5”) Refractor / 102 mm (4”) Reflector / 130 mm (5.1”)

Focal Length / Focal Ratio 1250 mm / f/14 1500 mm / f/12 660 mm / f/6 650 mm / f/5

Finderscope StarPointer StarPointer StarPointer StarPointer

Mount Motorized Altazimuth Motorized Altazimuth Motorized Altazimuth Motorized Altazimuth

Eyepieces / Star Diagonal 25 mm (50x), 9 mm (139x) / 1.25” 25 mm (60x), 9 mm (167x) / 1.25” 25 mm (26x), 9 mm (73x) / 1.25” 25 mm (26x), 9 mm (72x) / n/a

Tripod Pre-assembled Steel Pre-assembled Steel Pre-assembled Steel Pre-assembled Steel

CD-ROM TheSkyX and NSOL TheSkyX and NSOL TheSkyX and NSOL TheSkyX and NSOL

Telescope Control System NexStar Computer Control System NexStar Computer Control System NexStar Computer Control System NexStar Computer Control System

Database 4,000 Object Database 4,000 Object Database 4,000 Object Database 4,000 Object Database

Slew Speeds Nine slew speeds, 3º/sec MAX Nine slew speeds, 3º/sec MAX Nine slew speeds, 3º/sec MAX Nine slew speeds, 3º/sec MAX

Tracking Rates Sidereal, Solar and Lunar Sidereal, Solar and Lunar Sidereal, Solar and Lunar Sidereal, Solar and Lunar

Tracking Modes Alt-Az, EQ North and EQ South Alt-Az, EQ North and EQ South Alt-Az, EQ North and EQ South Alt-Az, EQ North and EQ South

GPS Compatible SkySync SkySync SkySync SkySync

SkyAlign, Auto 2-Star Align,1-Star Align, SkyAlign, Auto 2-Star Align,1-Star Align, SkyAlign, Auto 2-Star Align,1-Star Align, SkyAlign, Auto 2-Star Align,1-Star Align,

Alignment Procedures 2-Star Align, Solar System Align 2-Star Align, Solar System Align 2-Star Align, Solar System Align 2-Star Align, Solar System Align

Highest Useful Magnification 213x 300x 240x 306x

Limiting Stellar Magnitude 12.3 13 12.5 13.1

Resolution: Rayleigh / Dawes Limit 1.55 arc seconds / 1.29 arc seconds 1.1 arc seconds / .91 arc seconds 1.36 arc seconds / 1.14 arc seconds 1.06 arc seconds / .89 arc seconds

Photographic Resolution n/a n/a 308 lines/mm 400 line/mm

Light Gathering Power 165x unaided eye 329x unaided eye 212x unaided eye 345x unaided eye

Field of View (degrees) w/ low power eyepiece 1º .83º 1.7º 1.7º

Linear FOV (

@1000 yds) 53 ft. 44 ft. 91 ft. 91 ft.

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

Secondary Mirror Obstruction, Diameter, Area 1”, 28%, 8% 1.5”, 30%, 9% n/a 1.7”, 34%, 12%

Telescope Weight / Optical Tube Length 12 lbs / 11” 18 lbs / 15” 14 lbs / 23” 18 lbs / 21”

Specifications are subject to change without notice or obligation.

LCM Item # 22050 22051 31150

Model Name 60LCM 80LCM 114LCM

Optical Design / Aperture Refractor / 60 mm (2”) Refractor / 80 mm (3”) Newtonian reflector / 114 mm (4.5”)

Focal Length / Focal Ratio 700 mm / f/12 900 mm / f/11 1000 mm / f/8.8

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

Mount Motorized Altazimuth Motorized Altazimuth Motorized Altazimuth

Eyepieces 25 mm (28x), 9 mm (78x) 25 mm (36x), 9 mm (100x) 25 mm (40x), 9 mm (111x)

Star Diagonal 1.25” Erect Image 1.25” Erect Image n/a

Tripod Aluminum Aluminum Aluminum

CD-ROM TheSkyX TheSkyX TheSkyX

Database 4,000 Object Database 4,000 Object Database 4,000 Object Database

Slew Speeds Nine slew speeds, 3º/sec MAX Nine slew speeds, 3º/sec MAX Nine slew speeds, 3º/sec MAX

Tracking Rates / Tracking Modes Sidereal, Solar and Lunar / Alt-Az, EQ North and EQ South Sidereal, Solar and Lunar / Alt-Az, EQ North and EQ South Sidereal, Solar and Lunar / Alt-Az, EQ North and EQ South

Alignment Procedures SkyAlign, Auto 2-Star Align,1-Star Align, 2-Star Align, Solar System Align SkyAlign, Auto 2-Star Align,1-Star Align, 2-Star Align, Solar System Align SkyAlign, Auto 2-Star Align,1-Star Align, 2-Star Align, Solar System Align

Highest Useful Magnification 142x 189x 269x

Limiting Stellar Magnitude 11.4 12 12.8

Resolution: Rayleigh / Dawes Limit 2.32 arc seconds / 1.93 arc seconds 1.74 arc seconds / 1.45 arc seconds 1.22 arc seconds / 1.02 arc seconds

Light Gathering Power 73x 131x 265x

Field of View (degrees) w/ low power eyepiece 1.6º 1.6º 1.6º

Linear FOV (

@1000 yds) 84 ft. 84 ft. 84 ft.

Optical Coatings Fully-Coated Fully-Coated Fully-Coated

Secondary Mirror Obstruction, Diameter, Area n/a n/a 1.6”, 36%, 13%

Telescope Weight 10 lbs 14 lbs 15 lbs