7.5mm M54 to M54 Adapter

The ZWO 7.5mm M54 to M54 Adapter is a precision spacer ring designed to replace the original M54 to M48 step-down spacer on ZWO FF107 and FF130 APO focal reducers, enabling seamless integration with ZWO's CAA (Camera Angle Adjuster) electronic camera rotator without requiring additional step-up rings. This adapter maintains the standard 55mm back focus distance critical for optimal focus and imaging train compatibility, making it an essential accessory for astrophotographers using ZWO's compact refractor systems with electronic framing assistance. The adapter features M54x0.75 threading on both ends and provides a precise optical length control for imaging configurations.