PlaneWave CDK17 F/6.8 OTA

PlaneWave CDK17 – 17-Inch Corrected Dall-Kirkham Astrograph Telescope System

The CDK17 from PlaneWave Instruments is a testament to advanced engineering and optical precision, designed for astrophotographers and astronomers who demand elite performance. This mid-sized observatory-class instrument blends cutting-edge optics with rugged materials, offering a powerful and versatile platform for high-resolution imaging, photometry, and research-grade observation.

Featuring PlaneWave’s proprietary Corrected Dall-Kirkham (CDK) optical system, the CDK17 delivers sharp, coma-free, and flat-field performance across a wide image circle—making it ideal for large-format cameras and demanding scientific sensors. Combined with a rigid carbon fiber optical tube and thermally stable fused silica mirrors, this system excels in both remote and professional observatory environments.

Key Specifications

Optical Design: Corrected Dall-Kirkham (CDK)
Clear Aperture: 432mm (17 in)
Focal Ratio: f/6.8
Focal Length: 2939mm
Back Focus: 262.33mm from mounting surface
Image Circle: 70mm
Mirror Material: Fused silica – low thermal expansion
OTA Material: Carbon fiber – lightweight and rigid

Performance & Applications

- Wide Flat Field Imaging:
The CDK optical design eliminates off-axis coma, astigmatism, and field curvature—yielding a perfectly flat, wide image circle that supports large-format CCD and CMOS sensors.

- Research-Grade Precision:
Designed for advanced photometry, spectroscopy, and long-exposure astrophotography, the CDK17 supports data acquisition with minimal distortion and exceptional resolution.

- Thermal & Structural Stability:
The use of fused silica optics ensures minimal focus shift due to temperature changes, while the carbon fiber tube provides outstanding rigidity and low weight for optimal mount performance.

- Ideal for Permanent Installations:
The 17-inch aperture and robust construction make this an excellent choice for university observatories, imaging arrays, and remote-operated facilities targeting faint galaxies, nebulae, and time-domain astronomy.