Catadioptric (Cassegrain) Telescopes

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

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
$2,59995
12 Mos. Promo Financing*
More on the Way
Expected availability: 2-4 weeks
Celestron NexStar 6SE 150mm f/10 Schmidt-Cassegrain GoTo Telescope Observation Kit

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

B&H # CEN6SEB

Key Features

  • 6" NexStar 6SE SCT Telescope
  • 1500mm Focal Length, f/10 Focal Ratio
  • Computerized/Motorized Fork Mount
  • SkyPortal WiFi Module
$1,08900
12 Mos. Promo Financing*
In Stock

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

B&H # CEN6SETK3

Key Features

  • 150mm Schmidt-Cassegrain Telescope
  • 1500mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • SkyPortal WiFi Module
$99895
12 Mos. Promo Financing*
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
$87900
12 Mos. Promo Financing*
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
$57995
12 Mos. Promo Financing*
In Stock

Celestron NexStar 8SE 203mm f/10 Schmidt-Cassegrain Observation Kit

B&H # CEN8SEB

Key Features

  • 8" NexStar 8 SE SCT Telescope
  • 2032mm Focal Length, f/10 Focal Ratio
  • Computerized/Motorized Fork Mount
  • SkyPortal Wi-Fi Module
$1,57999
12 Mos. Promo Financing*
Back-Ordered

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

B&H # CENSE8 MFR # 12091

Key Features

  • 203mm Schmidt-Cassegrain OTA
  • 2032mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • Wireless Control with iOS/Android App
$1,79900
12 Mos. Promo Financing*
Back-Ordered
Expected availability:

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
$53900
12 Mos. Promo Financing*
In Stock

Celestron EdgeHD CGE 8" f/10 Aplanatic Schmidt-Cassegrain Telescope (OTA Only)

B&H # CEEDGEHD800 MFR # 91030-XLT

Key Features

  • 8" (203mm) Schmidt-Cassegrain OTA
  • 2032mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • EdgeHD Aplanatic Field-Flattener Design
$1,39900
12 Mos. Promo Financing*
More on the Way
Expected availability: 2-4 weeks

Sky-Watcher Virtuoso 90mm f/13.9 Maksutov-Cassegrain Multi-Purpose Motorized Mount

B&H # SKVVM MFR # S11750

Key Features

  • 90mm Maksutov-Cassegrain OTA
  • 1250mm Focal Length, f/13.9 Focal Ratio
  • Camera, Camcorder, Smartphone Mounts
  • Motorized Alt-Az Tabletop Mount
$30500
6 Mos. Promo Financing*
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
$89500
12 Mos. Promo Financing*
Special Order
Expected availability: 7-14 business days

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

B&H # CEN4SEB

Key Features

  • 102mm NexStar 4SE Mak-Cassegrain OTA
  • 1325mm Focal Length, f/13 Focal Ratio
  • WiFi Module, iOS/Android App Interface
  • Motorized Single-Arm Fork Mount
$69995
12 Mos. Promo Financing*
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
$1,39900
12 Mos. Promo Financing*
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
$2,44900
12 Mos. Promo Financing*
Back-Ordered
Expected availability:

Celestron 8" f/2.0 Rowe-Ackermann Schmidt Astrograph (OTA Only)

B&H # CE8RASAOTA MFR # 91073

Key Features

  • Patented Catadioptric Astrograph Design
  • 400mm Focal Length/ f/2.0 Focal Ratio
  • StarBright XLT Optical Coating System
  • 4-Element Rare-Earth Optical Glass
$1,79900
12 Mos. Promo Financing*
In Stock

Celestron EdgeHD 11" f/10 Aplanatic Schmidt-Cassegrain Telescope (OTA Only)

B&H # CE91050XLT MFR # 91050-XLT

Key Features

  • 11" (280mm) Schmidt-Cassegrain OTA
  • 2800mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • EdgeHD Aplanatic Field-Flattener Design
$3,69900
12 Mos. Promo Financing*
Back-Ordered
Expected availability:

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
$44995
6 Mos. Promo Financing*
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
$1,87900
Call For Promotion: 800-606-6969
12 Mos. Promo Financing*
Back-Ordered

Sky-Watcher 90mm f/14 Maksutov-Cassegrain Telescope (OTA Only)

B&H # SK90MMMCOTA MFR # S11500

Key Features

  • 90mm Aperture Maksutov-Cassegrain OTA
  • 1250mm Focal Length, f/14 Focal Ratio
  • Limited-Diffraction Optical System
  • Fully Multi-Coated Optics
$23500
6 Mos. Promo Financing*
More on the Way
Expected availability: 2-4 weeks

Sky-Watcher 127mm f/13 Maksutov-Cassegrain Telescope (OTA Only)

B&H # SK127MMMCOTA MFR # S11520

Key Features

  • 127mm Aperture Maksutov-Cassegrain OTA
  • 1500mm Focal Length, f/12 Focal Ratio
  • Limited-Diffraction Optical System
  • Fully Multi-Coated Optics
$46000
6 Mos. Promo Financing*
More on the Way
Expected availability: 2-4 weeks

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
$66400
12 Mos. Promo Financing*
In Stock

Celestron NexStar 5SE 125mm f/10 Schmidt-Cassegrain GoTo Telescope Observation Kit

B&H # CEN5SEB

Key Features

  • 5" NexStar 5SE SCT Telescope
  • 1250mm Focal Length, f/10 Focal Ratio
  • Computerized/Motorized Fork Mount
  • SkyPortal WiFi Module
$89995
12 Mos. Promo Financing*
More on the Way
Expected availability: 2-4 weeks

Explore Scientific FirstLight 152mm f/12.5 Alt-Az Maksutov-Cassegrain Telescope with Twilight 1 Mount

B&H # EXFLMAK152MC MFR # FL-MC1521900MAZ01

Key Features

  • 152mm Catadioptric OTA
  • 1900mm Focal Length, f/12.5 Focal Ratio
  • Fully Multi-Coated Optics
  • Internal Focusing Mechanism
$1,19999
12 Mos. Promo Financing*
Special Order
Expected availability: 7-14 business days

iOptron Photron 254mm f/8 Ritchey-Chretien Catadioptric Truss-Tube Telescope (OTA Only)

B&H # IO6114 MFR # 6114

Key Features

  • Open Carbon-Fiber Truss Tube System
  • Better Thermal Dynamics than Solid Tubes
  • 250mm Ritchey-Chretien Catadioptric OTA
  • 2032mm Focal Length, f/8 Focal Ratio
$2,99800
12 Mos. Promo Financing*
Special Order
Expected availability: 7-14 business days

Celestron CGEM II 800 8" f/2.0 Rowe-Ackermann Schmidt GoTo EQ Astrograph

B&H # CECGEMIIRASA MFR # 12020

Key Features

  • Patented Catadioptric Astrograph Design
  • 400mm Focal Length/ f/2.0 Focal Ratio
  • StarBright XLT Optical Coating System
  • 4-Element Rare-Earth Optical Glass
$3,09900
12 Mos. Promo Financing*
Special Order
Expected availability: 2-4 weeks

Celestron CGX 800 8" f/2.0 Rowe-Ackermann Schmidt GoTo EQ Astrograph

B&H # CECGX800RASA MFR # 12058

Key Features

  • Patented Catadioptric Astrograph Design
  • 400mm Focal Length/ f/2.0 Focal Ratio
  • StarBright XLT Optical Coating System
  • 4-Element Rare-Earth Optical Glass
$3,89900
12 Mos. Promo Financing*
Special Order
Expected availability: 2-4 weeks

Celestron CGEM II 1100 280mm f/10 Schmidt-Cassegrain GoTo Telescope

B&H # CECGEMIISCT MFR # 12012

Key Features

  • 280mm Schmidt-Cassegrain OTA
  • 2800mm Focal Length, f/10 Focal Ratio
  • CGEM II Motorized Equatorial Mount
  • NexStar+ Computer Controller
$3,39900
12 Mos. Promo Financing*
Special Order
Expected availability: 2-4 weeks

Celestron CPC Deluxe 1100 HD 11" f/10 Edge HD Aplanatic Cassegrain GoTo Telescope

B&H # CE11009 MFR # 11009

Key Features

  • 11" (280mm) Schmidt-Cassegrain OTA
  • 2800mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • EdgeHD Aplanatic Field-Flattener Design
$4,19900
12 Mos. Promo Financing*
Back-Ordered
Expected availability:

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
$4,69900
Call For Promotion: 800-606-6969
12 Mos. Promo Financing*
Back-Ordered

Celestron EdgeHD 14" f/11 Aplanatic Schmidt-Cassegrain Telescope (OTA Only)

B&H # CE91060XLT MFR # 91060-XLT

Key Features

  • 14" (356mm) Schmidt-Cassegrain OTA
  • 3910mm Focal Length, f/11 Focal Ratio
  • StarBright XLT Optical Coating System
  • EdgeHD Aplanatic Field-Flattener Design
$6,29900
12 Mos. Promo Financing*
Special Order
Expected availability: 7-10 business days
  • This item is noncancelable and nonreturnable.

YOUR RECENTLY VIEWED ITEMS

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.

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