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Celestron EdgeHD 8 OTA (CGE dovetail)
Celestron EdgeHD 8 OTA (CGE dovetail) 8" EdgeHD aplanatic optical tube, 2032 mm f/10, CGE (Losmandy-style) dovetail bar.
EdgeHD is Celestron's aplanatic, flat-field Schmidt-Cassegrain. It corrects off-axis coma and gives a focal plane more than three times flatter than a standard SCT, so stars stay sharp to the edge of large camera sensors. Mirror clutches reduce image shift during long exposures, filtered vents release warm air from behind the primary, and every tube is star-tested with a camera before it ships. Use it at native f/10, at f/7 with the matching EdgeHD 0.7× reducer, or at f/2 with third-party Fastar accessories.
Optical Optical design EdgeHD aplanatic Schmidt-Cassegrain Aperture 203 mm (8") Focal length 2032 mm Focal ratio f/10 Secondary obstruction 64 mm; 31% by diameter, 9.8% by area Coatings StarBright XLT Resolution 0.69″ (Rayleigh); 0.57″ (Dawes) Limiting magnitude 14 Fastar compatible Yes
Mechanical and package Tube length 432 mm Tube diameter 238 mm Weight 6.35 kg Tube Aluminium Dovetail CGE (Losmandy-style) dovetail bar
Manufacturer documentation
Reference
44014
Data sheet
Aperture (mm)
203
Coatings
StarBright XLT
Dovetail
CGE
Focal length (mm)
2032
Focal ratio
f/10
Limiting magnitude
14
Optical design
EdgeHD aplanatic SCT
Tube diameter (mm)
238
Tube length (mm)
432
Weight (kg)
6.35
Specific References
UPC
050234103091
EAN13
4047825028303
MPN
91030-XLT
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8" EdgeHD aplanatic optical tube, 2032 mm f/10, CGE (Losmandy-style) dovetail bar.
Manufacturer model: Celestron 91030-XLT · Specifications checked against manufacturer data on 2026-11-06