This incredibly versatile adapter lets you secure heavy 1.25" accessories to a 2" barrel and has extra auxiliary M48 x 0.75, M42 x 0.75 (T2) and M34 threads to attach a variety of accessories.
On the eyepiece side, two large knurled screws fix heavy 1.25" accessories via a bronze clamping ring. Additionally, the protection ring unscrews to reveal a male M42 x 0.75 (T2) thread, allowing you to attach a camera T-ring or eyepiece for projection.
The telescope side of the adapter features a female M48 x 0.75 filter thread for attaching 2" mounted filters, as well as a female M42 x 0.75 (T2) thread and female M34 thread for connecting Baader glass path correctors.