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
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.
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.
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 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× |
| 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×) |
Celestron EdgeHD 14 OTA · Celestron EdgeHD back-focus guide
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.
| 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 |
Data sheet
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
