- Astro T-2 System spacer (Fine-Adjustment) rings, available in thickness 0,3mm (black), 0,5mm (red), 1mm (gold)
- Very thin ring for finetuning in T-2 eyepiece projection
- Rings with T-2 inner diameter without threads
- Fits between all T-2 threads, equals approx. 2/5 (0,3mm), 2/3 (0,5mm) respectively 1 1/3 (1mm) turn of rotation. Rotation may differ slightly.
- Prevents binding between two T-2 threaded parts