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Catadioptric Telescopes

Items 1 - 25 of 56

Celestron C9.25 SCT Aluminum Optical Tube with CG-5 Dovetail - 91025-XLT - Used

SKU: UEQ-11570-CEL-91025-XLT
  • Optical Design: Schmidt-Cassegrain
  • Telescope Aperture: 235mm (9.25")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
$1,499.95 $999.00
 

Celestron C6-A SCT Optical Tube with CG-5 Dovetail - 91010-XLT

SKU: CEL-91010-XLT
  • Optical Design: Schmidt-Cassegrain
  • Telescope Aperture: 150mm (5.9")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$649.95 $398.95
 

Celestron C8-A SCT Aluminum Optical Tube with CG-5 Dovetail - 91020-XLT

SKU: CEL-91020-XLT
  • Optical Design: Schmidt-Cassegrain
  • Telescope Aperture: 203.2mm (8")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,059.95 $844.95
 

Celestron C8-A SCT Aluminum Optical Tube with CGE Dovetail - CEL-91024-XLT

SKU: CEL-91024-XLT
  • Optical Design: Schmidt-Cassegrain
  • Telescope Aperture: 203.2mm (8")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,049.95 $795.95
 

Celestron C9.25 SCT Aluminum Optical Tube with CG-5 Dovetail - 91025-XLT

SKU: CEL-91025-XLT
  • Optical Design: Schmidt-Cassegrain
  • Telescope Aperture: 235mm (9.25")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
Available Used from $999.00
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$1,499.95 $1,184.95
 

Celestron C9.25 SCT Aluminum Optical Tube with CGE Dovetail - 91027-XLT

SKU: CEL-91027-XLT
  • Optical Design: Schmidt-Cassegrain
  • Telescope Aperture: 235mm (9.25")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,469.95 $1,184.95
 

Celestron EdgeHD 8 OTA - 8" f/10 Aplanatic SCT OTA - CGE Dovetail - 91030-XLT

SKU: CEL-91030-XLT
  • Optical Design: Celestron EdgeHD
  • Telescope Aperture: 203.2mm (8")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,349.00
 

8" Celestron Edge HD 8 SCT OTA - CG-5 Dovetail - 91031-XLT

SKU: CEL-91031-XLT
  • Optical Design: Celestron EdgeHD
  • Telescope Aperture: 203.2mm (8")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,349.00
 

Celestron C11 SCT Aluminum Optical Tube with CGE Dovetail - 91036-XLT

SKU: CEL-91036-XLT
  • Optical Design: Schmidt-Cassegrain
  • Telescope Aperture: 279.4mm (11")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$2,469.95 $1,779.95
 

Celestron C14AF-XLT - 14" Aluminum SCT Fastar-Compatible Optical Tube with CGE Dovetail - 91038-XLT

SKU: CEL-91038-XLT
  • Optical Design: Schmidt-Cassegrain
  • Telescope Aperture: 355.6mm (14")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$4,999.95 $4,049.95
 

Celestron EdgeHD 925 OTA - 9.25" f/10 HD Aplanatic SCT Optical Tube Assembly - CGE Dovetail - 91040-XLT

SKU: CEL-91040-XLT
  • Optical Design: Celestron EdgeHD
  • Telescope Aperture: 235mm (9.25")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$2,399.00
 

Celestron EdgeHD 11 OTA - 11" f/10 Aplanatic SCT OTA - CGE Dovetail - 91050-XLT

SKU: CEL-91050-XLT
  • Optical Design: Celestron EdgeHD
  • Telescope Aperture: 279.4mm (11")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$3,499.00
 

Celestron EdgeHD 14 OTA - 14" f/11 Aplanatic SCT OTA - CGE Dovetail - 91060-XLT

SKU: CEL-91060-XLT
  • Optical Design: Celestron EdgeHD
  • Telescope Aperture: 356mm (14.02")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$5,999.00
 

Celestron C11 SCT Aluminum OTA with CG-5 Dovetail - 91067-XLT

SKU: CEL-91067-XLT
  • Optical Design: Schmidt-Cassegrain
  • Telescope Aperture: 279.4mm (11")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$2,499.95 $1,824.95
 

Celestron NexStar 8SE SCT OTA Orange Tube - 11069-OTA

SKU: CEL-11069-OTA
  • Optical Design: Schmidt-Cassegrain
  • Telescope Aperture: 203.2mm (8")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$849.95 $679.95
 

Meade 14" f/10 LX200 ACF OTA - 1410-60-01

SKU: MEA-1410-60-01
  • Optical Design: Meade ACF
  • Telescope Aperture: 355.6mm (14")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$4,949.00
 

Meade 16" f/10 LX200 ACF OTA - 1610-60-01

SKU: MEA-1610-60-01
  • Optical Design: Meade ACF
  • Telescope Aperture: 406mm (16")
  • Focal Ratio: f/10
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$6,849.00
 

GSO 12" f/8 Ritchey-Chretien Optical Tube - Truss Tube OTA - 12RCT

SKU: GSO-12RCT
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 305mm (12")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$4,295.00
 
GSO 10" Truss Tube RC

GSO 10" f/8 Ritchey-Chretien Optical Tube - Truss Tube OTA - 10RCT

SKU: GSO-10RCT
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 254mm (10")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$2,995.00
 
GSO 12" f/8 RC from Side

GSO 14" f/8 Ritchey-Chretien Optical Tube - Truss Tube OTA - 14RCT

SKU: GSO-14RCT
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 355.6mm (14")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$5,795.00
 
GSO 12" f/8 RC

GSO 16" f/8 Ritchey-Chretien Optical Tube - Truss Tube OTA - 16RCT

SKU: GSO-16RCT
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 406mm (16")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$6,995.00
 
GSO 8" f/8 RC Ritchey-Chretien OTA with Dual Dovetails

GSO 8" f/8 Ritchey-Chretien Optical Tube - Carbon Fiber OTA - 8RC

SKU: GSO-8RC
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 203.2mm (8")
  • Focal Ratio: f/8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,395.00
 

GSO 6" f/9 Ritchey-Chretien Optical Tube - Steel OTA - 6RC

SKU: GSO-6RC
  • Optical Design: Ritchey-Chretien
  • Telescope Aperture: 152.4mm (6")
  • Focal Ratio: f/9
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$399.00
 

Skywatcher Skymax 90 mm Maksutov-Cassegrain Telescope OTA - S11500

SKU: SKY-S11500
  • Optical Design: Maksutov-Cassegrain
  • Telescope Aperture: 90mm (3.54")
  • Focal Ratio: f/13.8
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$220.00
 

Skywatcher Skymax 102 mm Maksutov-Cassegrain Telescope OTA - S11510

SKU: SKY-S11510
  • Optical Design: Maksutov-Cassegrain
  • Telescope Aperture: 102mm (4.02")
  • Focal Ratio: f/12.7
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$265.00
 

The LX600 Catadioptric telescope design uses a combination of mirrors and lenses to gather light and form a sharp image. There is a wide range of popular telescopes for amateur astronomers, such as Schmidt-Cassegrain and Maksutov-Cassegrain telescopes, that are of the catadioptric design. There are also catadioptric telescopes for sale that are designed primarily for astrophotography or imaging, like the Ritchey-Chretien (RC), Meade ACF, and Celestron EdgeHD.

The Schmidt-Cassegrain Telescope, or SCT, is the most popular design in the broader catadioptric telescope line-up. The Schmidt-Cassegrain has a folded optical system consisting of a primary mirror and a corrector plate with the secondary mirror right in the center. This design allows the telescope tube to be much more compact than a Newtonian reflector or a Refractor. The most popular Schmidt-Cassegrain has a large 8" diameter mirror and an optical tube that is about 18" long - a perfect combination of good light-gathering and easy-to-carry portability.

The Maksutov-Cassegrain, or Mak-Cass, catadioptric telescope looks very much like an SCT but has a longer focal length due to the way the light travels inside the tube. The Maksutov-Cassegrain really shines when used for terrestrial or astronomical viewing, especially when turned to the Moon or planets, but it isn't the best choice for deep-sky astrophotography due to its long focal length when compared other catadioptric designs.

Catadioptrics optimized for imaging are rising in popularity as more amateur astronomers fall under the spell of astrophotography. These telescopes have a wide, flat field that works nicely with today's larger format DSLR and dedicated astronomy cameras. While many catadioptric telescopes for sale can be used for both visual astronomy and imaging, amateur astronomers who prefer visual observations or have a camera with a smaller sensor don't necessarily require the edge-to-edge flatness that a larger sensor does.

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