Stellarvue SFFX3 Field Flattener

The SFFX3 is specifically optimized for Stellarvue and other large-aperture refractors ranging from 127mm to 180mm. It is designed to correct field curvature for these specific focal lengths and apertures, so ensure your telescope falls within this range for optimal performance.

Yes, the SFFX3 is engineered specifically for full-frame sensors. It ensures that stars remain sharp and pinpoint from the center of the frame all the way to the edges, preventing the distortion typically seen with larger sensors.

The system features a flexible back-focus design. It comes with a 38mm extension tube to help you reach the standard 55mm back-focus requirement, but you can adjust your imaging train further by adding or removing components to accommodate filter wheels or rotators.

The SFFX3 utilizes an M75x1 thread for its focuser attachment. You should verify that your telescope's focuser is compatible with this thread size or that you have the appropriate adapter to secure it properly.

While the SFFX3 includes a 38mm extension tube to help reach the standard 55mm back-focus, you may need a camera-specific T-ring or adapter to connect your camera body to the flattener's output thread. Check your camera's mount type to ensure you have the correct interface.