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Celestron SC 235/2350 EdgeHD 925 Cassegrain OTA
Supplied as a standalone imaging tube, the Celestron SC 235/2350 EdgeHD 925 Cassegrain OTA provides 235mm aperture, 2350mm focal length, and EdgeHD field-flattening optics.
- 235mm aperture provides 0.49-arcsecond resolution
- 2350mm focal length uses f/10 optics
- EdgeHD design includes integrated field flattener
- 23mm eyepiece, diagonal, dovetail included
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Description
Standalone corrected-field imaging begins with the Celestron SC 235/2350 EdgeHD 925 Cassegrain OTA, a 9.25-inch EdgeHD aplanatic Schmidt-Cassegrain optical tube with a 2350 mm focal length and listed f/10 optical ratio. The OTA includes StarBright XLT coatings, internal focusing, primary mirror clutches, ventilation, Fastar and HyperStar compatibility, a 9×50 finder, 23 mm Luminos eyepiece, 2-inch diagonal, and full-length Losmandy-style dovetail rail.
The optical tube is supplied without an equatorial or alt-azimuth mount, tripod, counterweights, motorized tracking, power supply, or computerized control system, allowing the buyer to select compatible support equipment separately. Its 235 mm aperture and 2350 mm focal length support the listed planetary, lunar, deep-sky, and imaging applications, while final performance depends on mount capacity, alignment, camera spacing, thermal preparation, and selected accessories.
Key Features of Celestron SC 235/2350 EdgeHD 925 Cassegrain OTA
This standalone EdgeHD optical tube combines a 235 mm aperture with a 2350 mm focal length, StarBright XLT coatings, corrected field design, internal focusing, primary mirror clutches, ventilation, Fastar compatibility, 23 mm Luminos eyepiece, 9×50 finder, 2-inch diagonal, and Losmandy-style mounting hardware.
- 235 mm EdgeHD Schmidt-Cassegrain optical system
- 2350 mm focal length with listed f/10 optical ratio
- Premium StarBright XLT optical coatings
- Internal focusing and primary mirror clutches
- Fastar and HyperStar compatible
- Integrated tube ventilation
- 23 mm Luminos 2-inch eyepiece and 9×50 finder
- 2-inch diagonal and full-length Losmandy-style rail
Standalone Corrected-Field Imaging
The supplied application is a standalone optical tube for lunar, planetary, deep-sky, and supported astrophotography configurations, with EdgeHD correction and Fastar compatibility supporting suitable imaging workflows while final tracking, payload capacity, camera compatibility, thermal preparation, and alignment depend on the separately selected mount and telescope accessories.
Why Choose Celestron SC 235/2350 EdgeHD 925 Cassegrain OTA
The EdgeHD 9.25 OTA is relevant for buyers who already own or plan to select a compatible mount and need a large corrected-field optical tube with StarBright XLT coatings, Fastar compatibility, primary mirror clutches, ventilation, 2-inch visual hardware, finder, eyepiece, diagonal, and a Losmandy-style rail for heavy-duty mounting.
- Large 235 mm EdgeHD aperture with long 2350 mm focal length
- Corrected field, Fastar support, mirror clutches, and ventilation
- Eyepiece, finder, diagonal, and full-length mounting 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 separate EdgeHD 9.25 product versions and mounting profiles, so buyers should confirm whether coverage applies to the OTA, included accessories, focusing mechanism, mirror clutches, ventilation system, and separately purchased mount or imaging equipment.
Celestron SC 235/2350 EdgeHD 925 Cassegrain OTA Specs
| Brand | Celestron |
| Full Model Code | Celestron EdgeHD 9.25-inch Optical Tube Assembly (91030-XLT) |
| Country of Origin | United States / China |
| Optical Design | EdgeHD (Aplanatic Schmidt-Cassegrain with Integrated Doublet Field Flattener) |
| Aperture | 235 mm (9.25 inches) |
| Focal Length | 2350 mm |
| Focal Ratio | f/10 |
| Optical Coatings | Premium StarBright XLT High-Transmission Coatings |
| Secondary Mirror Obstruction | 85 mm |
| Secondary Mirror Obstruction by Diameter | 36% |
| Secondary Mirror Obstruction by Area | 13% |
| Resolving Power | 0.49 Arcseconds (Dawes), 0.59 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 14.4 |
| Highest Useful Magnification | 555x |
| Lowest Useful Magnification | 34x |
| Optical Tube Material | Aluminum |
| Focuser Style & Mechanism | Internal Primary Mirror Focus Assembly with Two Mirror Support Clutches and Integrated Mesh Louver Vents |
| Mirror Lock Mechanism | Yes (Dual Tension Knobs locking the primary mirror to the rear cell) |
| Optical Tube Dimensions | 271.78 mm x 559 mm |
| Optical Tube Weight | 9.53 kg (21.0 lbs) |
| Mount Attachment Type | Full-Length Losmandy CGE Style Dovetail Bar Profile |
| Finder Scope Specification | 9x50 Optical Finder Scope with Bracket |
| Included Accessories | 23mm Luminos 2-inch Eyepiece (102x), 2-inch Mirror Diagonal with 1.25-inch Adapter, CGE Dovetail Rail |
| Standard Warranty | 2-Year Limited Warranty |
| Application | Standalone premium aplanatic core optimized for wide-field sensor tracking and coma-free deep sky imaging, deploying internal flattening glass metrics to uniform focus boundaries across the entire focal plane. |
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