Alpine Astronomical M68 to 3.3" Combination Adapter

This adapter allows medium-format camera M68 T-rings and other accessories to be mounted on larger Schmidt-Cassegrain telescopes with 3.3" visual back threads. The system includes a 3.3" SCT reducer ring and an M68 T-ring. The adapter has a short 11.5mm optical height that minimally affects the telescope's back focus, ensuring clear and sharp images.