Celestron EdgeHD 14 — 356 mm aplanatic Schmidt-Cassegrain (CGE dovetail) The EdgeHD 14 optical tube is Celestron's largest EdgeHD: a 356 mm (14-inch) aplanatic, flat-field Schmidt design at 3910 mm f/11. EdgeHD optics virtually eliminate field curvature and off-axis coma, giving pinpoint stars to the edge of large imaging sensors and wide-field eyepieces.
Manufacturer model: Celestron EdgeHD 14" OTA (CGE Dovetail) · Specifications checked against manufacturer data on 2026-11-03
Celestron EdgeHD 14 — 356 mm aplanatic Schmidt-Cassegrain (CGE dovetail)
The EdgeHD 14 optical tube is Celestron's largest EdgeHD: a 356 mm (14-inch) aplanatic, flat-field Schmidt design at 3910 mm f/11. EdgeHD optics virtually eliminate field curvature and off-axis coma, giving pinpoint stars to the edge of large imaging sensors and wide-field eyepieces.
Three focal ratios
Use it at native f/11, at f/7 with the dedicated EdgeHD 1400 0.7× reducer, or at ultra-fast f/2 with third-party accessories, thanks to the removable secondary mirror (Fastar compatible). Celestron's optimised image circle is 42 mm, large enough for a full-frame sensor.
Imaging setup
The optimum back focus is 146.05 mm from the 3-inch baffle tube lock ring, or 133.35 mm from the 3-inch-to-2-inch reducer plate. The EdgeHD T-adapter for the 14-inch threads onto the 3.29-inch × 16 TPI thread and, with a standard 55 mm camera spacing, places the sensor at the correct distance.
Optical
Optical design
EdgeHD aplanatic Schmidt-Cassegrain
Aperture
356 mm (14")
Focal length
3910 mm
Focal ratio
f/11 (f/7 with 0.7× reducer)
Optimised image circle
42 mm
Secondary obstruction
114 mm; 32% by diameter, 10% by area
Coatings
StarBright XLT
Resolution
0.39″ (Rayleigh); 0.33″ (Dawes)
Limiting magnitude
15.3
Useful magnification
51× to 840×
Mechanical and package
Back focus
146.05 mm from 3" baffle lock ring; 133.35 mm from 3"-to-2" plate
Tube length
787 mm
Tube diameter
400.5 mm
Weight
21 kg
Tube
Aluminium
Dovetail
CGE dovetail bar
Included
9×50 finderscope; 2" mirror diagonal with 1.25" adapter; 23 mm Luminos 2" eyepiece (170×)
EdgeHD 14 OTA with CGE dovetail, not C14 (standard SCT). Celestron OTA page lists f/11; some Celestron package pages state f/10. Use EdgeHD 1400 0.7x reducer (94240), not the generic 0.63x reducer.
Additional specifications
Secondary obstruction
114 mm; 32% diameter; 10% area
Resolution (arcsec)
0.39 Rayleigh; 0.33 Dawes
Useful magnification
51x–840x
Rear thread
3.29-inch x 16 TPI
Fastar
Removable secondary, f/2 with third-party accessories
16403
Datasheet
Opening (mm)
356
Backfocus (mm)
146.05 from 3-inch baffle ring; 133.35 from 3-to-2 plate
Coatings
StarBright XLT
Zwaluwstaart
CGE
Brandpuntsafstand (mm)
3910
Openingsverhouding
f/11
Beeldcirkel (mm)
42
Inbegrepen
9x50 finder; 2-inch diagonal; 23 mm Luminos 2-inch
Grensmagnitude
15.3
Optisch ontwerp
EdgeHD aplanatic SCT
Tubusdiameter (mm)
400.5
Tubuslengte (mm)
787
Gewicht (kg)
21
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Celestron EdgeHD 14 — 356 mm aplanatic Schmidt-Cassegrain (CGE dovetail) The EdgeHD 14 optical tube is Celestron's largest EdgeHD: a 356 mm (14-inch) aplanatic, flat-field Schmidt design at 3910 mm f/11. EdgeHD optics virtually eliminate field curvature and off-axis coma, giving pinpoint stars to the edge of large imaging sensors and wide-field eyepieces.
Manufacturer model: Celestron EdgeHD 14" OTA (CGE Dovetail) · Specifications checked against manufacturer data on 2026-11-03
