PlaneWave .66x Reducer for IRF90 & CDK20/ CDK24
The PlaneWave .66x Reducer for IRF90 & CDK20/ CDK24 is designed specifically for flat field telescopes like the CDK using the integrated rotating focuser (IRF90). It reduces the f ratio of the CDK telescope 66%. The f/6.8 CDK20 telescopes will be reduced to about f/4.5 and the f/6.5 CDK24 to about f/4.3.
**NOTE – 125166 adapter is compatible with CDK17 that have 10.24″ back focus. CDK17 with 8.81″ back focus will use the 200166 focal reducer. See instruction manual for details.