Long Perng introduce its Threaded Adapters Threaded Adapter for Astrophotography Compatible with DCS 2" Focuser and Field Flattener Compatibility: Fits LP Field Flattener models DCS Field Flattener Suitable for LP Refractors with a 2" focuser. Features: Enhanced Collimation Stability for Astrophotography: Directly threads the field flattener or reducer to the draw tube, replacing the 2” barrel attachment to the focuser, minimizing off-axis errors. Integrated M48x0.6P Filter Thread: Allows for the attachment of various filters. Quick and Easy Assembly: Designed for efficient setup and breakdown. Assembly Instructions: Step 1: Remove the 2" end adapter from the draw tube. Step 2: Detach the 2" barrel from the field flattener. Step 3: Securely thread the field flattener directly onto the draw tube.