Connect your SBIG filter wheel or off-axis guider to your telescope focuser's draw tube, focal reducer, or field flattener with this adapter plate! It is designed to work with the FW8S-Aluma, StarChaser SC-2 OAG (off-axis guide camera), and the OAG-8300. You can also use it with older STT and self-guided Aluma wheels.

The M48 x 0.75 thread is the same as what is found on many DSLR and Mirrorless digital camera adapter rings. It is sometimes called a "wide-T" ring.