Planewave - CDK450 Observatory System - CDK17 with L-550 Mount
Planewave Instruments CDK450 Observatory System
The Planewave CDK450 Observatory System is a professional-grade telescope platform designed for astrophotographers, astronomy researchers, and serious visual observers. Combining the 17 inch CDK17 optical tube with the high-precision L-550 direct-drive mount, the system delivers exceptional image clarity, stability, and tracking accuracy. Its advanced optical design, robust carbon-fiber construction, and rapid thermal management make it ideal for deep-sky imaging, photometry, spectroscopy, and extended observation sessions. With fast target acquisition and precise movement, the CDK450 is a versatile observatory solution for both scientific research and high-end astrophotography.
Key Features of the CDK450 System
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Corrected Dall-Kirkham Optical Design – Sharp, coma-free, flat-field imaging across a 52 mm image circle.
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High-Stability Carbon-Fiber Construction – Minimizes thermal expansion for reliable optical alignment.
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L-550 Direct-Drive Mount – Smooth, silent, and precise tracking with zero backlash and high-resolution encoders.
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Rapid Target Acquisition – Slew speeds up to 50° per second for quick repositioning of celestial objects.
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Advanced Thermal Management – Strategically placed fans ensure fast thermal stabilization and consistent imaging quality.
About the CDK 17
Advanced Optical Design
The CDK17 from Planewave uses the Corrected Dall-Kirkham optical design to deliver a field completely free of off-axis coma and astigmatism, along with a perfectly flat field across a 52 mm image circle. This configuration enables critically sharp images throughout the full viewing area, making it ideal for advanced astrophotography and scientific imaging.
High-Quality Construction
A robust carbon-fiber structure ensures minimal thermal expansion and rapid thermal equilibration. This material choice helps maintain precise optical alignment in environments where temperatures fluctuate, supporting dependable performance during extended observation sessions.
Superior Mirrors and Coatings
Fused silica mirrors provide outstanding thermal stability and minimal expansion, and high-efficiency optical coatings maximize light transmission while reducing stray light. These components contribute to exceptional clarity, contrast, and imaging precision.
Thermal Management
An advanced cooling system with strategically positioned fans promotes fast thermal stabilization. This configuration supports consistent, high-quality imaging and reduces focus drift caused by temperature changes.
Aperture and Focal Length
The Planewave CDK17 features a 17-inch aperture with a 3454 mm focal length, operating at a fast f/6.8 focal ratio. The system includes a shorter 262 mm back-focus distance, offering increased compatibility with a wide range of imaging equipment.
About the L-550 Direct Drive Mount
Direct-Drive Motor Technology
The L-550 mount from Planewave utilizes advanced direct-drive motors on both axes. This configuration allows smooth, fast, and nearly silent telescope movement with zero backlash and zero periodic error which is ideal for high-precision tracking and rapid repositioning during demanding imaging sessions.
High-Resolution Encoders
High-resolution optical encoders on each axis support extremely accurate pointing and movement. This capability is essential for elite astrophotography, precise data collection, and advanced astronomical research.
Azimuth Dovetail Balance System
A finely adjustable balance system improves stability and performance in both alt-azimuth and equatorial configurations. This engineering reduces mechanical stress and allows reliable long-duration tracking during extended observations.
Rapid Target Acquisition
Slew speeds up to 50 degrees per second provide fast and efficient movement between targets. This agility makes the CDK450 an excellent choice for satellite tracking, time-sensitive astronomical events, and responsive imaging workflows.
Planewave CDK450 Use Case Advantages
Astrophotography
The CDK450 from Planewave delivers exceptional tracking accuracy, image stability, and optical quality. These characteristics support stunning deep-sky and planetary imaging with superior detail and color performance. The L-550 mount supports a high payload capacity suitable for mounting a secondary telescope on the exterior hub.
Astronomy Research
Researchers benefit from the CDK450’s consistent performance, precision tracking, and stable platform. The system is well suited for photometry, spectroscopy, minor-planet work, and other data-driven scientific applications requiring high reliability.
Visual Observations
For observers seeking premium visual performance, the CDK450 offers bright, detailed views of planets, the Moon, galaxies, and nebulae. The combination of a large aperture and advanced optical engineering enhances every visual session with crisp, high-contrast imagery.
Space Situational Awareness (SSA) and Space Domain Awareness (SDA)
Fast, precise movement from the L-550 mount enables effective tracking of satellites and orbital debris. While the L-series supports many SSA and SDA tasks, Planewave recommends the T-600 Direct-Drive Gimbal for users requiring dedicated, mission-level SSA/SDA performance. The T-600 is engineered for superior responsiveness, accuracy, and space-object monitoring.
CDK450 Specifications
| Mount Weight | 338 lbs (153 kg) |
| Max. Load Capacity | 300 lbs (136 kg) |
| Latitude Range | 0 to 90 degrees, Northern and Southern hemispheres |
| Cable Management | Equipment cables can be wired through mount |
| Control Electronics | PlaneWave Interface dual axis telescope control |
| User Interface | PlaneWave Interface 4 (PWI4) Control Software with integrated PointXP mount modeling software |
| Homing Sensors | Home position sensors are included allowing the mount can find its home position on power up. |
| Slew Rate | 20 degrees per second (standard); 50 degrees per second (maximum), both axes |
| Power Requirement | Accepts 120 to 240 VAC. Supplied with 120 VAC 15A IEC Type B Regulated Power Adapter. |
| Aperture | 17 inch (432 mm) |
| Focal Length | 2939 mm (115.71 inch) |
| Focal Ratio | f/6.8 |
| Central Obstruction | 23.7% by surface area; 48.6% of the primary mirror diameter |
| Backfocus from Mounting Surface | 10.32 inch (262.33 mm) |
| Backfocus from Racked in Focuser | 7.24 inch (184 mm) |
| Weight | 106 lbs (48 kg) |
| Optimal Field of View | 70mm image circle |
| Motor – Azimuth and Altitude | Direct Drive 3 Phase Axial-Flux Torque Motors |
| Encoder – Azimuth and Altitude | 152mm stainless steel encoder ring with reader built into the azimuth and altitude axes. 18,880,000 counts per revolution (0.069 arcsecond resolution). |
| Motor Torque | Approximately 20 ft-lbs continuous; 50 ft-lbs peak |
| Drive Electronics | Industrial grade, off-the-shelf brushless motor drives for each axis with custom designed interface card |
| Telescope Control Software | Uses PWI4. Incorporates PointXP mount modeling software by Dave Rowe. All ASCOM compatible. |
| Pointing Accuracy | <10 arcsecond RMS with PointXP Model |
| Pointing Precision | 2 arcseconds at sidereal velocity |
| Tracking Accuracy | 0.3 arcseconds over a 5-minute period at sidereal velocity |
| System Natural Frequency | 10 Hz or greater |
| Brand | PlaneWave Instruments |
|---|---|
| Free Shipping | Does Not Qualify for Free Shipping |
| Case Included | No |
| Accessory Tray Included? | Yes |
| Adjustable Legs? | No |
| GPS | No |
| Includes Autoguide Port | No |
| Periodic Error Correction | Yes |
| In The Box |
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- CDK14 Optical Tube
- L-550 Direct Drive Mount
- OTA Cover
- Flash Drive
- Hardware
- 16′ USB Cable
- 120VAC Power Cable
- Standard Allen Key Set
- Gamepad
- Dovetail Saddle (200919)
Shopping Guide
