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Vai al moduloCelestron EdgeHD 8" CG5 – Aplanatic Schmidt-Cassegrain OTA (Demo Unit)
The Celestron EdgeHD 8" is an aplanatic Schmidt-Cassegrain optical tube with a 203 mm aperture and 2032 mm focal length (f/10), engineered to deliver diffraction-limited performance. This demo unit is in excellent, like-new condition, with only a few missing protective plastics. It is ideal for high-resolution visual observing and advanced astrophotography, including full-frame imaging.
EdgeHD Optics: Sharpness to the Edge of the Field
The EdgeHD system combines the compactness of the Schmidt-Cassegrain design with a fully corrected field. Visually, it produces pinpoint stars across the entire field, even with 2" wide-angle eyepieces. For imaging, it delivers a flat and aberration-free field, perfectly suited for DSLR and CCD/CMOS full-frame cameras.
Versatile and Modular Design
The modular architecture allows operation across a broad focal range, from 400 mm to 8000 mm (using optional accessories). The OTA is Fastar compatible, includes a primary mirror lock for improved imaging stability, and features ventilated openings with microfilters for rapid thermal equilibration.
Starbright XLT Coating
The Starbright XLT coating maximizes light transmission and enhances contrast, providing excellent performance on planets as well as deep-sky objects.
Included Accessories
- 40 mm Plössl eyepiece (51×) – 1.25"
- 1.25" prism diagonal
- 9×50 optical finder with quick-release bracket
- CG5/EQ5/EQ6/Vixen-compatible dovetail bar
Technical Specifications
| Optical design | Aplanatic Schmidt-Cassegrain EdgeHD |
| Aperture | 203 mm |
| Focal length | 2032 mm |
| Focal ratio | f/10 |
| Central obstruction | 0.35 |
| Light gathering | 843× (compared to the naked eye) |
| Focusing method | Primary mirror movement |
| Fastar compatible | Yes |
| Telescope tube material | Aluminium |
| OTA length | 432 mm |
| Weight | 6.35 kg |
| Notes | Mirror lock + micro-filtered ventilation ports |
| Condition | Demo unit, like new |
A reference-grade optical tube for serious visual observers and astrophotographers, offered here as a high-quality demo unit in excellent condition.