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Celestron SC 203/2032 C8 Cassegrain OTA
As an independent optical tube, the Celestron SC 203/2032 C8 Cassegrain OTA provides a 203.2mm Schmidt-Cassegrain with 2032mm focal length, Fastar compatibility, and flexible dovetail options.
- 203.2mm aperture provides 0.57-arcsecond resolution
- 2032mm focal length uses f/10 optics
- Fastar and HyperStar compatibility is specified
- 25mm eyepiece and dovetail included
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Description
Portable high-contrast observation starts with the Celestron SC 203/2032 C8 Cassegrain OTA, a standalone 8-inch Schmidt-Cassegrain optical tube with a 2032 mm focal length and listed f/10 optical ratio. The C8 OTA uses StarBright XLT coatings, internal primary-mirror focusing, Fastar and HyperStar compatibility, a 6×30 finder, 25 mm Plossl eyepiece, 1.25-inch star diagonal, visual back, and selectable CG-5 or CGE dovetail profiles for compatible mounts.
The optical tube is supplied without a mount, tripod, counterweights, tracking electronics, or power system, allowing the buyer to select a compatible platform separately. Its 203.2 mm aperture and long 2032 mm focal length support the listed lunar, planetary, deep-sky, and supported imaging applications, while final tracking, payload, camera compatibility, and system stability depend on the separately selected mount and accessories.
Key Features of Celestron SC 203/2032 C8 Cassegrain OTA
This standalone Schmidt-Cassegrain optical tube combines a 203.2 mm aperture with a 2032 mm focal length, StarBright XLT coatings, internal focusing, Fastar and HyperStar compatibility, 6×30 finder, 25 mm eyepiece, star diagonal, visual back, and flexible dovetail mounting options.
- 203.2 mm Schmidt-Cassegrain optical system
- 2032 mm focal length with listed f/10 optical ratio
- Premium StarBright XLT coatings
- Internal primary-mirror focus assembly
- Fastar and HyperStar compatible
- 6×30 optical finder scope
- 25 mm Plossl eyepiece and 1.25-inch diagonal
- CG-5 or CGE dovetail profile options
Standalone Catadioptric Configuration
The supplied application is a standalone optical tube for lunar observation, planetary viewing, deep-sky inspection, and supported imaging configurations, while the final mount stability, tracking behavior, payload support, power requirements, camera connection, alignment, and control system depend on the separately selected telescope platform and compatible accessories.
Why Choose Celestron SC 203/2032 C8 Cassegrain OTA
This model is a suitable choice when a buyer wants an 8-inch Schmidt-Cassegrain optical tube with StarBright XLT coatings, long focal length, Fastar and HyperStar compatibility, internal focusing, supplied visual accessories, optical finder, visual back, and a dovetail interface suited to compatible consumer telescope mounts.
- Large 203.2 mm catadioptric aperture
- Long 2032 mm focal length with Fastar compatibility
- Eyepiece, diagonal, finder, visual back, and dovetail rail included
Celestron 2-Year Limited Warranty
The supplied product information lists a 2-year limited warranty for this optical tube assembly, while current manufacturer listings may identify different dovetail and regional package details, so buyers should confirm whether coverage applies to the OTA, included accessories, focusing mechanism, mounting hardware, and any separately purchased mount or imaging equipment used with the C8 system.
Celestron SC 203/2032 C8 Cassegrain OTA Specs
| Brand | Celestron |
| Full Model Code | Celestron C8 Optical Tube Assembly (91020-XLT / 91030-XLT) |
| Country of Origin | United States / China |
| Optical Design | Schmidt-Cassegrain (Catadioptric Core) |
| Aperture | 203.2 mm (8.0 inches) |
| Focal Length | 2032 mm |
| Focal Ratio | f/10 |
| Optical Coatings | Premium StarBright XLT High-Transmission Coatings |
| Secondary Mirror Obstruction | 64 mm |
| Secondary Mirror Obstruction by Diameter | 31% |
| Secondary Mirror Obstruction by Area | 9.77% |
| Resolving Power | 0.57 Arcseconds (Dawes), 0.69 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 14.0 |
| Highest Useful Magnification | 480x |
| Lowest Useful Magnification | 29x |
| Optical Tube Material | Aluminum |
| Focuser Style & Mechanism | Internal Primary Mirror Focus Assembly |
| Mirror Lock Mechanism | No (Fastar and HyperStar Compatible) |
| Optical Tube Dimensions | 238 mm x 432 mm |
| Optical Tube Weight | 5.67 kg (12.5 lbs) |
| Mount Attachment Type | Available with CG-5 Vixen-Style or CGE Losmandy-Style Dovetail Bar Profiles |
| Finder Scope Specification | 6x30 Optical Finder Scope with Bracket |
| Included Accessories | 25mm Plossl Eyepiece (81x), 90-Degree Star Diagonal (1.25-inch), 1.25-inch Visual Back, Dovetail Mounting Bar |
| Standard Warranty | 2-Year Limited Warranty |
| Application | Portable optical collector module for high-contrast planetary monitoring and deep sky inspection, delivering an f/10 catadioptric beam path adaptable to variable consumer platform rails. |
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