Catadioptric (Cassegrain) Telescopes

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Celestron Origin Intelligent Home Observatory
New Release

Celestron Origin Intelligent Home Observatory

B&H # CECOIHO MFR # 12099
Key Features
  • 6"/152mm f/2.2 RASA Optical Tube
  • Computerized GoTo Alt-Az Mount
  • Displays Imagery on Phone or Device
  • Sony Starvis CMOS Sensor, 2.4µ Pixels
$3,99900
New Item - Coming Soon
Celestron NexStar 8SE 203mm f/10 Schmidt-Cassegrain GoTo Telescope

Celestron NexStar 8SE 203mm f/10 Schmidt-Cassegrain GoTo Telescope

B&H # CEN8SE MFR # 11069
Key Features
  • 203mm Schmidt-Cassegrain Telescope
  • 2032mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • Single-Fork Motorized GoTo Alt-Az Mount
$1,59900
In Stock

Celestron NexStar 6SE 150mm f/10 Schmidt-Cassegrain GoTo Telescope

B&H # CEN6SE MFR # 11068
Key Features
  • 150mm Schmidt-Cassegrain Telescope
  • 1500mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • Single-Fork Motorized GoTo Alt-Az Mount
$99900
Reg. $1,099.00
Save $100.00
In Stock

Sky-Watcher SkyMax 127 Virtuoso GTi Telescope (25th Anniversary Edition)

B&H # SKS21225 MFR # S21225
Key Features
  • 127mm Aperture Maksutov-Cassegrain OTA
  • 1500mm Focal Length, f/12 Focal Ratio
  • Computerized Tabletop Alt-Az Base
  • Control via SynScan Pro App
$77500
In Stock

Celestron NexStar 127SLT 127mm f/12 Maksutov-Cassegrain GoTo Telescope

B&H # CEN127SLT MFR # 22097
Key Features
  • 127mm Maksutov-Cassegrain OTA
  • 1500mm Focal Length, f/12 Focal Ratio
  • Single-Arm Motorized Alt-Az Mount
  • NexStar Computer Hand Controller
$53141
In Stock

Sky-Watcher 180mm f/15 Maksutov-Cassegrain Telescope (OTA Only)

B&H # SK180MMMCOTA MFR # S11540
Key Features
  • 180mm Aperture Maksutov-Cassegrain OTA
  • 2700mm Focal Length, f/15 Focal Ratio
  • Limited-Diffraction Optical System
  • Anti-Reflection Fully Multi-Coated Glass
$1,18575
In Stock

Celestron NexStar Evolution 8 203mm f/10 EdgeHD Aplanatic Cassegrain GoTo Telescope with StarSense AutoAlign

B&H # CENE8ESTR MFR # 12096
Key Features
  • 203mm Aplanatic Catadioptric OTA
  • 2032mm Focal Length, f/10 Focal Ratio
  • Flat-Field, Coma-Free EdgeHD Optics
  • StarBright XLT Optical Coating System
$2,69900
Reg. $2,949.00
Save $250.00
In Stock
Other Buying Options

Sky-Watcher 102mm f/13 Maksutov-Cassegrain Telescope (OTA Only)

B&H # SK102MMMCOTA MFR # S11510
Key Features
  • 102mm Aperture Maksutov-Cassegrain OTA
  • 1300mm Focal Length, f/13 Focal Ratio
  • Limited-Diffraction Optical System
  • Fully Multi-Coated Optics
$27200
In Stock

Explore Scientific FirstLight 127mm f/15 Maksutov-Cassegrain Telescope (OTA Only)

B&H # EXFLMC12719 MFR # FL-MC1271900
Key Features
  • 127mm Catadioptric OTA
  • 1900mm Focal Length, f/15 Focal Ratio
  • Fully Multi-Coated Optics
  • Internal Focusing Mechanism
$47999
In Stock

Celestron StarSense Explorer 125mm f/10 Schmidt Cassegrain Telescope

B&H # CESSEDX5SCT MFR # 22462
Key Features
  • Use Smartphone App for Star Navigation
  • Follow Directions to Find Great Objects
  • Advanced Precise Alignment Algorithm
  • 125mm Schmidt-Cassegrain Optical Tube
$59995
In Stock

Celestron NexStar 4SE 102mm f/13 Maksutov-Cassegrain GoTo Telescope with Observer's Kit

B&H # CEN4SEOAK
Key Features
  • 102mm Maksutov-Cassegrain Telescope
  • 1325mm Focal Length, f/13 Focal Ratio
  • StarBright XLT Optical Coating System
  • 40,000+ Object NexStar+ Hand Controller
$65999
In Stock

Celestron C8-A-XLT CGE 8" f/10 Schmidt-Cassegrain Telescope (OTA Only)

B&H # CEC8AXLT MFR # 91024-XLT
Key Features
  • 8" (203mm) Schmidt-Cassegrain OTA
  • 2032mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • 25mm Eyepiece and 90° Star Diagonal
$1,26999
In Stock

Explore Scientific FirstLight 100mm f/14 Alt-Az Maksutov-Cassegrain Telescope with Twilight Nano Mount

B&H # EXFLMAK100MC MFR # FL-MC1001400TN
Key Features
  • 100mm Catadioptric OTA
  • 1400mm Focal Length, f/14 Focal Ratio
  • Fully Multi-Coated Optics
  • Internal Focusing Mechanism
$37999
Special Order
Expected availability: 7-14 Business Days

Celestron NexStar 90SLT 90mm f/14 Maksutov-Cassegrain GoTo Telescope

B&H # CEN90SLT MFR # 22087
Key Features
  • 90mm Maksutov-Cassegrain OTA
  • 1250mm Focal Length, f/14 Focal Ratio
  • Single-Arm Motorized Alt-Az Mount
  • Fully Multi-Coated Optics
$44072
In Stock

Celestron NexStar 4SE 102mm f/13 Maksutov-Cassegrain GoTo Telescope

B&H # CEN4SE MFR # 11049
Key Features
  • 102mm Maksutov-Cassegrain Telescope
  • 1325mm Focal Length, f/13 Focal Ratio
  • StarBright XLT Optical Coating System
  • NexStar+ Computer Hand Controller
$67900
In Stock

iOptron Photron 150mm f/9 Ritchey-Chrétien Catadioptric Telescope (OTA Only)

B&H # IO6111 MFR # 6111
Key Features
  • 150mm Ritchey-Chrétien Catadioptric OTA
  • 1370mm Focal Length, f/9 Focal Ratio
  • Low Thermal-Expansion Quartz Mirrors
  • Dielectric Mirror Coatings
$55800
In Stock

Sky-Watcher Skymax 127 AZ-GTi 127mm f/12 GoTo Maksutov-Cassegrain Telescope

B&H # SKS21130 MFR # S21130
Key Features
  • 127mm Aperture Maksutov-Cassegrain OTA
  • 1500mm Focal Length, f/12 Focal Ratio
  • Limited-Diffraction Optical System
  • Motorized Computer-Controlled AZ Mount
$88000
In Stock

Sky-Watcher 150mm f/12 Maksutov-Cassegrain Telescope (OTA Only)

B&H # SK150MMMCOTA MFR # S11530
Key Features
  • 150mm Aperture Maksutov-Cassegrain OTA
  • 1800mm Focal Length, f/12 Focal Ratio
  • Limited-Diffraction Optical System
  • Fully Multi-Coated Optics
$73920
In Stock

iOptron Photron 200mm f/8 Ritchey-Chrétien Catadioptric Telescope (OTA Only)

B&H # IO6112 MFR # 6112
Key Features
  • 200mm Ritchey-Chrétien Catadioptric OTA
  • 1624mm Focal Length, f/8 Focal Ratio
  • Low Thermal-Expansion Quartz Mirrors
  • Dielectric Mirror Coatings
$1,17800
In Stock

Celestron NexStar Evolution 6 150mm f/10 Schmidt-Cassegrain GoTo Telescope

B&H # CENSE6 MFR # 12090
Key Features
  • 150mm Schmidt-Cassegrain OTA
  • 1500mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • Wireless Control with iOS/Android App
$1,49900
Reg. $1,679.00
Save $180.00
In Stock

Celestron Advanced VX 8" f/10 GoTo EQ Schmidt-Cassegrain Telescope

B&H # CEAVX8SCTK MFR # 12026
Key Features
  • 8" (203mm) Schmidt-Cassegrain OTA
  • 2032mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • Motorized Computer-Controlled EQ Mount
$2,29900
In Stock

Celestron NexStar Evolution 9.25 235mm f/10 AZ GoTo Schmidt-Cassegrain Telescope

B&H # CENSE9.25K MFR # 12092
Key Features
  • 235mm Schmidt-Cassegrain OTA
  • 2350mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • Wireless Control with iOS/Android App
$2,84900
In Stock

Celestron EdgeHD 9.25" f/10 Aplanatic Schmidt-Cassegrain Telescope (OTA Only)

B&H # CEEDGEHD925 MFR # 91040-XLT
Key Features
  • 9.25" (235mm) Schmidt-Cassegrain OTA
  • 2350mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • EdgeHD Aplanatic Field-Flattener Design
$2,99900
In Stock

Celestron C11-A XLT 11" f/10 Schmidt-Cassegrain Telescope (OTA Only, CGE Dovetail)

B&H # CEC11AXLT MFR # 91036-XLT
Key Features
  • 11" Schmidt-Cassegrain OTA
  • 2800mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coatings
  • 40mm Eyepiece, 90° Diagonal
$3,19995
In Stock

Celestron CGEM II 800 8" f/2 Rowe-Ackerman Schmidt Astrograph GoTo Telescope

B&H # CECGEMIIRASK MFR # 12020
Key Features
  • Patented Catadioptric Astrograph Design
  • 400mm Focal Length/ f/2 Focal Ratio
  • StarBright XLT Optical Coating System
  • 4-Element Rare-Earth Optical Glass
$3,79900
In Stock

Celestron CPC Deluxe 925 HD 9.25" f/10 Cassegrain GoTo AZ Telescope

B&H # CE11008K MFR # 11008
Key Features
  • 2350mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • EdgeHD Aplanatic Field-Flattener Design
  • Motorized GoTo Dual Fork Azimuth Mount
$3,79900
Reg. $4,299.00
Save $500.00
In Stock

Celestron CGEM II 1100 EdgeHD 11" f/10 SCT GoTo EQ Telescope

B&H # CECGEMII110K MFR # 12019
Key Features
  • 11" (280mm) Schmidt-Cassegrain OTA
  • 2800mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • EdgeHD Aplanatic Field-Flattener Design
$5,69900
In Stock

Celestron EdgeHD 11" f/10 Aplanatic Schmidt-Cassegrain EQ GoTo Telescope

B&H # CECGX1100HDK MFR # 12057
Key Features
  • 11" (280mm) Schmidt-Cassegrain OTA
  • 2800mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • EdgeHD Aplanatic Field-Flattener Design
$6,39900
In Stock

Learning About Catadioptric Telescopes

The three major types of reflecting telescopes are Newtonian, Schmidt-Cassegrain (SCTs), and catadioptric (Cassegrain). The catadioptric telescope has dual mirrors to create a folded optical path. Unlike original reflectors (Newtonian), with catadioptric reflectors, light is reflected off the sides of the telescope instead of the back. SCTs have the same folded optical path, but include a thin correction lens at the front of the scope to improve the final image. Maksutov-Cassegrain telescopes have a unique feature as well, a negative lens at the entrance pupil. The main difference between Maksutov and other reflector telescopes is that they don't require alignment before use.


Choosing a Cassegrain Telescope

Select the Cassegrain telescope that fits your specific viewing needs, as not all of them offer the same features. Maksutov-Cassegrain options provide compact sizes and reliable optics for people who live in the city, and they're primarily designed for viewing larger planets and dual stars. SCTs are bulkier but allow viewers to observe galaxies and singular stars in addition to planets. SCT telescopes produce better results in open spaces because city lights can cause glare and poor viewing conditions. Selecting additional accessories such as telescope diagonals and prisms can provide you with clearer planetary viewing and increase detail.


Computerized Telescopes

Celestron-NexStar telescopes come in computerized versions, with Wi-Fi modules that can connect directly to your mobile device via the SkyPortal app. Celestron is famous for creating high-quality refractor telescopes for astronomical and terrestrial viewing. Glass lenses inside these telescope grab light and bend it to produce an image.


B&H Photo and Video carries telescopes and accessories such as cases, lens filters, and stands, to give you the best viewing experience. Amateur astrologists or telescope enthusiasts can also browse through a large selection of all-in-one telescope kits.