PlaneWave CDK20 Corrector Lens Assembly

PlaneWave CDK20 Lens Group – Convert f/7.7 to f/6.8

This optional lens group is designed to convert a CDK20 from f/7.7 to a wider-field f/6.8 configuration. The process involves simply unscrewing the existing rear lens group from the backplate of the optical tube and replacing it with this alternate lens set.

Key Specifications
Original Configuration: CDK20 f/7.77
Converted Configuration: CDK20 f/6.8
Focal Length Reduction: 3951mm → 3454mm
Back Focus Reduction: 1.79" removed

Performance & Applications
- Wider Field Imaging: Ideal for users who need a broader field of view for large-format sensors
- Easy Installation: Quick lens group swap with no need for re-collimation
- Flexible System Adaptation: Provides the versatility to optimize focal length for different imaging goals

OR

PlaneWave CDK20 Lens Group – Convert f/6.8 to f/7.7

This accessory lens group is designed to convert a CDK20 telescope from f/6.8 to a narrower-field f/7.7 configuration. Simply unscrew the current rear lens group and install this assembly onto the optical tube.

Key Specifications
Original Configuration: CDK20 f/6.8
Converted Configuration: CDK20 f/7.77
Focal Length Increase: 3454mm → 3951mm
Back Focus Increase: Adds 1.79"

Performance & Applications
- Increased Back Focus: Adds valuable space in the imaging train for filter wheels, rotators, and other accessories
- Higher Magnification: Useful for targets requiring tighter framing or increased scale
- Modular Design: Allows your CDK20 system to adapt as your imaging needs evolve