- Brand: PlaneWave Instruments
- Product Code: 200399
- Availability: Ships directly from manufacturer
(For CDK17 and CDK20 only): This adapter slides into the 3.5" Hedrick Focuser that comes standard on the CDK17 and CDK20. The adapter steps the 3.5" opening down to 2" for standard 2" accessories. The adapter also adds some additional spacing to optimize the use of a 2" diagonal so focus is reached with most eyepieces.