PrimaLuceLab ESATTO Adapter

This adapter converts the M81 male thread found on the ESATTO 3-inch focuser draw tube into an M72 female connection, allowing you to attach accessories with an M72 male thread.

Yes, it adds exactly 5mm of optical length to your imaging train. You will need to account for this 5mm extension when calculating your total back focus requirements.

No, this adapter is specifically engineered for the ESATTO 3-inch focuser. It is designed to thread directly onto that specific draw tube and may not fit or function correctly with other focuser models.

You need this adapter if you are using high-quality imaging accessories that utilize an M72 male thread and want to integrate them seamlessly into your ESATTO 3-inch system without compromising the optical path.

Because it is a precision-machined component designed specifically for the ESATTO 3-inch focuser, it provides a rigid, secure connection that minimizes the risk of flexure, provided your threaded connections are fully tightened.