15mm T2 Extension Tube

The Baader 15mm T-2 Extension Tube is a precision spacing adapter featuring internal and external T-2 threads (M42x0.75) that securely sets or varies spacing between T-2 optical components in astrophotography imaging trains. With full internal threading and blackening, it eliminates stray light reflections and is essential for fine-tuning back focus distance, adjusting projection ratios for eyepiece projection, and positioning coma correctors and telecompressors. This modular component integrates seamlessly into Baader's ASTRO T-2 System for critical astrophotography setups requiring precise optical spacing adjustments.