PlaneWave CDK12.5 F/8 OTA

PlaneWave CDK12.5 – 12.5-Inch Corrected Dall-Kirkham Telescope System

The CDK12.5 from PlaneWave Instruments represents a fusion of precise engineering and innovative optical design, developed for astrophotographers and researchers seeking professional-grade performance in a compact form. Designed to deliver diffraction-limited imaging across large-format sensors, the CDK12.5 combines ease of use with high-end capability—making it equally suited for personal observatories and institutional research facilities.

With its 12.5-inch aperture and fully corrected optical path, this system eliminates common aberrations such as coma and astigmatism while maintaining a perfectly flat field. Constructed from carbon fiber and fused silica components, it ensures long-term thermal and mechanical stability across diverse imaging environments.

Key Specifications

Optical Design: Corrected Dall-Kirkham (CDK)
Clear Aperture: 318mm (12.5 in)
Focal Ratio: f/8
Focal Length: 2541mm
Back Focus: 265mm from mounting surface
Image Circle: 52mm
Mirror Material: Fused silica – low thermal expansion
OTA Material: Carbon fiber – lightweight and rigid
Focusing System: EFA (Electronic Focuser Assembly) box included – integrates temperature monitoring, fan control, and automated focusing via PWI4 Software

Performance & Applications

- Wide-Field Precision Imaging:
Delivers a perfectly flat 52mm image circle with no off-axis coma or astigmatism—ideal for large-format CCD/CMOS sensors and full-frame astrophotography.

- Scientific Utility:
Well-suited for photometric and astrometric research thanks to its consistent field performance and thermally stable optical design.

- Thermal and Structural Stability:
Fused silica optics and carbon fiber construction maintain optical alignment and focus during rapid temperature changes and long exposures.

- Compact and Observing-Ready:
At 12.5 inches, the CDK12.5 is compact enough for portable use but powerful enough for deep sky and research-grade imaging.

- Integrated Focus Automation:
The included EFA system enables remote and automated focusing, temperature monitoring, and fan control, streamlining your imaging sessions with advanced observatory control via PWI4.