3" Visual Back - ESATTO/ARCO 3"

This adapter allows you to connect a camera with a 3" nosepiece to your ESATTO 3" or ARCO 3" focuser, making it ideal for visual observation or when working with large format cameras on major telescope designs. The adapter features an internal brass compression ring to avoid scratching the inserted nosepiece as well as 3 locking screws (120° separation) for a perfect fit, even for heavy cameras or accessories. The optical length is 12.5mm, minimizing back focus requirements while maintaining optical precision for astrophotography and visual applications.