Celestron EdgeHD 11" Optical Tube Assembly CGE Dovetail
050234105095
Fulfilled by Celestron
This item is fulfilled by Celestron UK. For more details, please see the panel below the product description.
Celestron EdgeHD 11" Optical Tube Assembly (CGE Dovetail)
See the Universe in True HD
The Celestron EdgeHD 11" OTA delivers astrograph-quality performance with a flat, coma-free field right to the edge of today’s largest imaging sensors. Whether you’re imaging galaxies, nebulae, planets or observing visually, the EdgeHD system ensures pinpoint stars, superb contrast, and outstanding sharpness across the frame.
True Astrograph Performance
Many “astrograph” designs flatten only part of the field or leave curvature visible on flat camera sensors. EdgeHD optics are engineered to deliver:
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Three-times flatter focal plane than standard SCT designs
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Tight, round star shapes across large-format chips
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Beautiful, contrast-rich visual views with wide eyepieces
Perfect for DSLR, mirrorless and dedicated astronomy cameras.
Optimised for Imaging & Visual Use
Improved Optical & Mechanical Control
StarBright XLT coatings maximise light throughput, while precision mechanics ensure stable performance night after night.
Key design enhancements:
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Mirror clutches reduce image shift during long exposures
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Rear cooling vents with dust filters to equalise temperature faster
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Fastar-compatible secondary allows ultra-fast f/2 imaging with third-party accessories
At native f/10, you retain superb image scale. Add an optional reducer for f/7 wide-field performance.
Individually Tested for Quality
Every EdgeHD telescope undergoes final testing with a camera and artificial star to verify that the optical train performs to specification across the full field—so you can buy and image with confidence.
Included Accessories
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9×50 finderscope
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2" mirror diagonal with 1.25" adapter
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23 mm Luminos 2" eyepiece (wide-angle, premium build)
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CGE dovetail bar for secure mounting on compatible mounts
Specifications
Optical design: EdgeHD Schmidt-Cassegrain
Aperture: 279.4 mm (11")
Focal length: 2800 mm • Focal ratio: f/10
Magnification (supplied eyepiece): 122× (23 mm)
Highest useful magnification: 660×
Lowest useful magnification: 40×
Limiting stellar magnitude: 14
Resolution:
• Rayleigh: 0.50" • Dawes: 0.42"
Light-gathering power: 1593× (vs. human eye)
Secondary obstruction:
• Diameter 95 mm (34%) • Area 12%
Optics: StarBright XLT coatings
Tube: Aluminum
Length: 610 mm (24")
Diameter: 312.4 mm (12.3")
Weight: 12.7 kg (28 lb)
Dovetail: CGE dovetail bar
Why Choose the EdgeHD 11" OTA?
✔ Astrograph-ready, flat field for modern large sensors
✔ Exceptional resolution for galaxies, globular clusters & lunar/planetary work
✔ Modular focal options: f/10, f/7 (reducer), f/2 (Fastar)
✔ Premium coatings and mechanical stability for demanding imaging
A powerhouse optical tube for ambitious imagers and serious visual observers.
Solar Safety Reminder
Never look directly at the Sun with any optical instrument without a proper, secure solar filter. Permanent eye injury or equipment damage may occur.
Shipping Options
Shipping Options
Returns Policy
Returns Policy
Fulfilled By Celestron
Products marked “Fulfilled by Celestron” are shipped directly from the manufacturer.
When you place an order with Welsh Astronomy Centre, the order is processed by us as normal. We then securely forward the order details to Celestron, who dispatch the item directly to your delivery address.
How it works
- You place your order with Welsh Astronomy Centre
- We process the order and send the fulfilment request to Celestron
- Celestron ships the item directly to you
Mixed Orders
If your basket contains a mix of items:
- In-stock items from Welsh Astronomy Centre will be shipped directly from us
- Items marked “Fulfilled by Celestron” will be dispatched separately by the manufacturer
This means your order may arrive in separate deliveries.
