Catadioptric Telescopes
Celestron Edge HD 11" f/10 Aplanatic SCT OTA - 91050-XLT - NEAF Demo
- 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
Celestron CPC Deluxe 800 with Edge HD Optics and Free 2" Diagonal - 11007
- Optical Design: Celestron EdgeHD
- Telescope Aperture: 203.2mm (8")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
- Extra Free Accessory: 2" SCT Dielectic Diagonal & 2" to 1.25" Adapter
Celestron 925 CPC Deluxe with EdgeHD Optics & Free 2" Diagonal - 11008
- Optical Design: Celestron EdgeHD
- Telescope Aperture: 235mm (9.25")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
- Extra Free Accessory: 2" SCT Dielectic Diagonal & 2" to 1.25" Adapter
Celestron CPC Deluxe 1100 with Edge HD Optics - 11009
- Optical Design: Celestron EdgeHD
- Telescope Aperture: 279.4mm (11")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
Celestron NexStar 5SE Computerized Telescope with Free Eyepiece & Filter - 11036
- Optical Design: Schmidt-Cassegrain
- Telescope Aperture: 125mm (4.92")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
- Extra Included Accessories: 15 mm Plossl Eyepiece and a Moon Filter!
Celestron NexStar 4SE Computerized Telescope with Free Eyepiece & Filter - 11049
- Optical Design: Maksutov-Cassegrain
- Telescope Aperture: 102mm (4.02")
- Focal Ratio: f/13
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
- Extra Included Accessories: 15 mm Plossl Eyepiece and a Moon Filter!
Celestron NexStar 6SE Computerized Telescope with Free Accessories - 11068
- Optical Design: Schmidt-Cassegrain
- Telescope Aperture: 150mm (5.9")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
- Extra Included Accessories: 15 mm & 32 mm Plossl Eyepieces, a 2X Barlow lens and a Moon Filter!
Celestron NexStar 8SE Computerized Telescope with Free Accessories - 11069
- Optical Design: Schmidt-Cassegrain
- Telescope Aperture: 203mm (7.99")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
- Extra Included Accessories: 15 mm & 32 mm Plossl Eyepieces, a 2X Barlow lens and a Moon Filter!
Celestron NexStar 8SE Schmidt-Cassegrain Computerized Telescope - 11069 - NEAF Demo
- Optical Design: Schmidt-Cassegrain
- Telescope Aperture: 203.2mm (8")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
Celestron CPC 800 SCT Computerized Telescope with Free 2" Diagonal - 11073-XLT
- Optical Design: Schmidt-Cassegrain
- Telescope Aperture: 203.2mm (8")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
- Extra Free Accessory: 2" SCT Carbon Fiber Diagonal with 2" to 1.25" Adapter
Celestron 925 CPC SCT Computerized Telescope with Free 2" Diagonal - 11074-XLT
- Optical Design: Schmidt-Cassegrain
- Telescope Aperture: 235mm (9.25")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
- Extra Free Accessory: 2" SCT Carbon Fiber Diagonal with 2" to 1.25" Adapter
Celestron CPC 1100 11" SCT Computerized Telescope with Free 2" Diagonal - 11075-XLT
- Optical Design: Schmidt-Cassegrain
- Telescope Aperture: 279.4mm (11")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
- Extra Free Accessory: 2" SCT Carbon Fiber Diagonal with 2" to 1.25" Adapter
Celestron SkyProdigy 6 Computerized Telescope - 11076
- Optical Design: Schmidt-Cassegrain
- Telescope Aperture: 152mm (5.98")
- Focal Ratio: f/9.9
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
Celestron Advanced VX Series 8" Schmidt-Cassegrain Go To Telescope - 12026
- Optical Design: Schmidt-Cassegrain
- Telescope Aperture: 203.2mm (8")
- Focal Ratio: f/10
- Telescope Mount Type: Equatorial
- Type of Electronics: Computerized GoTo
- Extra Free Accessories: Celestron Polar Scope for AVX Mount
Celestron Advanced VX Series 8" EdgeHD Go To Telescope - 12031
- Optical Design: Celestron EdgeHD
- Telescope Aperture: 203.2mm (8")
- Focal Ratio: f/10
- Telescope Mount Type: Equatorial
- Type of Electronics: Computerized GoTo
- Extra Free Accessories: Celestron Polar Scope for AVX Mount
Celestron Advanced VX Series 9.25" Schmidt-Cassegrain Go To Telescope - 12046
- Optical Design: Schmidt-Cassegrain
- Telescope Aperture: 235mm (9.25")
- Focal Ratio: f/10
- Telescope Mount Type: Equatorial
- Type of Electronics: Computerized GoTo
- Extra Free Accessories: Celestron Polar Scope for AVX Mount
Celestron Advanced VX Series 11" Schmidt-Cassegrain Go To Telescope - 12067
- Optical Design: Schmidt-Cassegrain
- Telescope Aperture: 280mm (11.02")
- Focal Ratio: f/10
- Telescope Mount Type: Equatorial
- Type of Electronics: Computerized GoTo
- Extra Free Accessories: Celestron Polar Scope for AVX Mount
Celestron Advanced VX Series 6" Schmidt Cassegrain Go To Telescope - 12079
- Optical Design: Schmidt-Cassegrain
- Telescope Aperture: 150mm (5.9")
- Focal Ratio: f/10
- Telescope Mount Type: Equatorial
- Type of Electronics: Computerized GoTo
- Extra Free Accessories: Celestron Polar Scope for AVX Mount
Celestron NexStar 90 SLT Computerized Telescope - 22087
- Optical Design: Maksutov-Cassegrain
- Telescope Aperture: 90mm (3.54")
- Focal Ratio: f/13.9
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
Celestron NexStar 127 SLT Computerized Telescope - 22097
- Optical Design: Maksutov-Cassegrain
- Telescope Aperture: 127mm (5")
- Focal Ratio: f/12
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
Meade 8" ACF Light Switch Computerized Telescope - 0810-03-10
- Optical Design: Meade ACF
- Telescope Aperture: 203.2mm (8")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
Meade 8" LX200 ACF Computerized Telescope - 0810-60-03
- Optical Design: Meade ACF
- Telescope Aperture: 203.2mm (8")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
Meade 8" LX90 ACF Computerized Telescope - 0810-90-03
- Optical Design: Meade ACF
- Telescope Aperture: 203.2mm (8")
- Focal Ratio: f/10
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
Meade 10" LX600-ACF (f/8) Telescope with StarLock - 1008-70-01
- Optical Design: Meade ACF
- Telescope Aperture: 254mm (10")
- Focal Ratio: f/8
- Telescope Mount Type: Alt-Azimuth
- Type of Electronics: Computerized GoTo
Meade 10" LX850 ACF Telescope with Starlock - 1008-85-01
- Optical Design: Meade ACF
- Telescope Aperture: 254mm (10")
- Focal Ratio: f/8
- Telescope Mount Type: Equatorial
- Type of Electronics: Computerized GoTo
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.
