PlaneWave CDK550 Observatory System — CDK20 / L-550 The CDK550 pairs PlaneWave's CDK20 f/6.8 Corrected Dall-Kirkham optical tube with the L-550 direct-drive mount. The telescope gives a flat field free of off-axis coma and astigmatism, while the mount's direct-drive motors provide zero backlash, zero periodic error and slews of up to 50° per second in…
Manufacturer model: PlaneWave CDK550 (CDK20 f/6.8 / L-550) · Specifications checked against manufacturer data on 2026-11-03
The CDK550 pairs PlaneWave's CDK20 f/6.8 Corrected Dall-Kirkham optical tube with the L-550 direct-drive mount. The telescope gives a flat field free of off-axis coma and astigmatism, while the mount's direct-drive motors provide zero backlash, zero periodic error and slews of up to 50° per second in alt-azimuth or equatorial orientation.
The fork base is a welded stainless steel torsion box. Control is through PlaneWave's PWI4 software with PointXP mount modelling, ASCOM compatible, and equipment cables can be routed through the mount.
| Optical tube | CDK20 f/6.8, Corrected Dall-Kirkham |
|---|---|
| Aperture | 508 mm (20") |
| Focal length | 3454 mm |
| Focal ratio | f/6.8 |
| Central obstruction | 39% of primary diameter |
| Image circle | 52 mm |
| Back focus | 224 mm from mounting surface |
| OTA weight | 63.5 kg |
| Mount | L-550 direct-drive, alt-az / equatorial |
|---|---|
| Fork base | Welded stainless steel torsion box |
| Mount weight | 153 kg (338 lb) |
| Maximum load | 136 kg (300 lb) |
| Swing-through length | 650.748 mm from altitude axis |
| Encoders | 18,880,000 counts/rev (0.069") |
| Slew rate | 20°/s standard; 50°/s maximum |
| Latitude range | 0–90°, both hemispheres |
| Power | 100–240 V AC 50/60 Hz |
| Saddle | PlaneWave Wide Saddle |
PlaneWave CDK550 system · CDK20 OTA · L-550 mount
CDK550 = CDK20 f/6.8 + L-550. Piers, wedges and focus accessories sold separately.
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PlaneWave CDK550 Observatory System — CDK20 / L-550 The CDK550 pairs PlaneWave's CDK20 f/6.8 Corrected Dall-Kirkham optical tube with the L-550 direct-drive mount. The telescope gives a flat field free of off-axis coma and astigmatism, while the mount's direct-drive motors provide zero backlash, zero periodic error and slews of up to 50° per second in…
Manufacturer model: PlaneWave CDK550 (CDK20 f/6.8 / L-550) · Specifications checked against manufacturer data on 2026-11-03
