ZWO Canon EOS Lens Adapter for 2" EFW Filter Wheel - EFW2-EOS

 The ZWO EFW2-EOS adapter was designed by ZWO in order to connect a Canon EOS EF lens with a ZWO EFW2 2" filter wheel.  This short adapter takes up 11.5 mm of back focus and can only work with ASI cooled cameras with 12.5 mm back focus, such as the ASI16200 and ASI2600.

The thread of the interface is M54 and so therefore does not fit the 1.25" EFW electronic filter wheels.