PlaneWave CDK550 Observatory System - CDK20 / L-550 | PixelSkiesAstro
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  • PlaneWave CDK550 Observatory System - CDK20 / L-550 | PixelSkiesAstro

PlaneWave CDK550 Observatory System - CDK20 / L-550

€95,500.00
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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

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 alt-azimuth or equatorial orientation.

System

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

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

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

Manufacturer documentation

PlaneWave CDK550 system · CDK20 OTA · L-550 mount

Compatibility notes

CDK550 = CDK20 f/6.8 + L-550. Piers, wedges and focus accessories sold separately.

1323255Q

Data sheet

Aperture
508 mm (20")
Back focus
224 mm from mounting surface
Encoders
18,880,000 cpr
Focal length
3454 mm
Focal ratio
f/6.8
Image circle
52 mm
Max load
136 kg (300 lb)
Mount
L-550
Mount weight
153 kg (338 lb)
Obstruction
39% of primary diameter
Optical tube
CDK20 f/6.8
OTA weight
63.5 kg
Power
100-240 VAC
Slew
20 std / 50 max deg/s
Swing through
650.748 mm
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