Bob's Knobs for Vixen R200SS Primary: Enhance Collimation Precision Optimize Your Vixen R200SS: Elevate your telescope's collimation precision with Bob's Knobs designed for the Vixen R200SS primary. Part Details - Part: R200pri: Collimation Knobs: These black plastic knobs, with a 13 mm (1/2") diameter, feature stainless steel threads to ensure reliable collimation adjustments. Locking Knobs: Easily identify and use the red plastic knobs with a 16 mm (5/8") diameter and stainless steel threads for securing collimation settings. Important Notes: Staggered Height: Due to the proximity of factory collimation and locking screws, the knobs must be staggered in height. Locking knobs extend further for easy identification. Compatibility: Early R200SS versions may use metric M5 screws for primary adjustments instead of the M4 screws provided. If M5 screws are needed, please specify this during checkout. Handle with Care: Protect the locking knobs from damage and avoid using them as support feet for the OTA. Enhance your Vixen R200SS telescope's collimation accuracy with Bob's Knobs. Upgrade today for improved performance.
