Celestron EdgeHD 9.25-Inch SCT Optical Tube Assembly (Open Box)
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Free standard shipping
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Condition: Open Box
Condition Details: Fully functional item with opened or replaced packaging; essential accessories included.
The Celestron EdgeHD 9.25" Schmidt-Cassegrain Optical Tube Assembly is a high-performance telescope designed for both advanced visual observing and astrophotography. Featuring an aplanatic, flat-field optical design, it delivers sharp, aberration-free images from edge to edge—ideal for capturing detailed views of the Moon, planets, and deep-sky objects.
True Flat-Field Optics
Unlike standard Schmidt-Cassegrain designs, EdgeHD optics produce an astrograph-quality flat focal plane, ensuring pinpoint stars across large camera sensors and the entire visual field.
Exceptional Image Quality
With a 9.25-inch aperture and a 2350mm focal length, this OTA offers excellent resolution and light-gathering power. StarBright XLT optical coatings maximize light transmission for brighter, higher-contrast views across visual and photographic wavelengths.
Optimized for Imaging
Designed for versatility, the EdgeHD supports imaging at its native f/10, with optional reducers for wider fields of view, Barlow lenses for planetary imaging, and Fastar compatibility for ultra-fast f/2 imaging when paired with third-party accessories.
Advanced Mechanical Design
Mirror clutches minimize image shift during long exposures, while rear cooling vents with integrated filters help the optics reach thermal equilibrium faster—critical for sharp, stable imaging sessions.
Individually Tested for Quality
Each EdgeHD OTA is factory tested using artificial stars and imaging systems to ensure it meets Celestron’s strict optical and mechanical standards.
A powerful and flexible platform for serious astronomy and astrophotography, the Celestron EdgeHD 9.25" OTA delivers professional-level optical performance in a robust, imaging-ready design.
Celestron EdgeHD 9.25-Inch SCT Optical Tube Assembly
Optical Design
| Optical design | EdgeHD Schmidt-Cassegrain |
| Aperture | 234.95 mm (9.25 in) |
| Focal length | 2350 mm (93 in) |
| Focal ratio | f/10 |
| Optical coatings | StarBright XLT |
Performance
| Highest useful magnification | 555× |
| Lowest useful magnification | 34× |
| Limiting stellar magnitude | 14.4 |
| Resolution (Rayleigh) | 0.59 arcseconds |
| Resolution (Dawes) | 0.49 arcseconds |
| Light gathering power | 1127× (compared to human eye) |
Secondary Mirror
| Secondary mirror diameter | 85 mm (3.35 in) |
| Obstruction by diameter | 36% |
| Obstruction by area | 13% |
Included Optics & Accessories
| Eyepiece | 23 mm (0.91 in) |
| Magnification with included eyepiece | 102× |
| Finderscope | 9×50 |
| Star diagonal | 2 in with 1.25 in adapter |
Physical Specifications
| Optical tube material | Aluminum |
| Optical tube length | 559 mm (22 in) |
| Optical tube weight | 21 lb (9.53 kg) |
Mounting Compatibility
| Dovetail compatibility | CGE mount standard |
Shipping & Returns
Frequently Asked Questions
How do I return an item?
How do I return an item?
Returns are incredibly simple. Please log into your account, find your item you wish to return and follow the prompts to make a return. If you do not have an account, click here to find your order and make a return.
Will I receive a full refund when I return an item?
Will I receive a full refund when I return an item?
You will receive a full refund when you return an item in its original manufacturer’s packaging, undamaged and unmarked. If the item you are returning is priced at less than $35, you will be charged a 15% restocking fee. Please note you will not be refunded any shipping charges.
How many days do I have to make a return?
How many days do I have to make a return?
You have 30 days to make a return. During the holiday season, from November 1 to December 31, we extend the return window to 60 days.
My item was damaged in transit. How do I place a return?
My item was damaged in transit. How do I place a return?
If your order has been noticeably damaged in transit, we strongly recommend that you refuse delivery and notify us immediately. Claims for missing items or items damaged in transit must be made within 48 hours of delivery. If there is carrier damage, please contact support@focuscamera.com with your order number and a description of the damage.
There’s an issue with my order, what should I do?
There’s an issue with my order, what should I do?
Oh no! Please contact our customer service team so we can resolve the issue immediately. You can call us on 1.800.221.0828, email us at support@focuscamera.com, or send us a message here.
Can I exchange an item?
Can I exchange an item?
We do not currently offer exchanges. Please return the item you purchased within 30 days and order what you’d like instead.
If I ordered a kit, do I have to return all the items?
If I ordered a kit, do I have to return all the items?
If you ordered a kit, you must return all components and accessories to receive a full refund.
I ordered a product that included a free item. I’d like to return it, do I need to return the free item as well?
I ordered a product that included a free item. I’d like to return it, do I need to return the free item as well?
If you ordered a product that included a free item, you must include the free item with your return. If not, your return will not be accepted and you will not receive a full refund.
Do you offer repairs?
Do you offer repairs?
We currently only offer camera repairs at our Brooklyn store. The item must be dropped off and collected in person as we do not accept shipped items for repair. For more information, please call our Brooklyn store on 1.718.431.7900.
What is your return policy?
What is your return policy?
Most items can be returned within 30 days for a full refund. Click here to read our full return policy.
