PlaneWave CDK20 F/7.77 Corrector Lens Assembly

This is lens group is designed to convert a CDK20 f/6.8 to f/7.77. The original lens group is unscrewed from the backplate of the optical tube and replaced with the new lens group.

• Adds 1.9″ of backfocus to the optical tube for those requiring additional imaging train components.
• Increases focal length to 3951mm, which is an additional 497 mm of focal length compared to the standard CDK20 f/6.8.