The DuoScope allows you to mount a camera or a second telescope on the counterweight bar. This will save you the money for counterweights and significantly reduce the load on your mount. The DuoScope allows you to max out the load capacity of your mount, making it a significantly cheaper option than a larger mount!
This version of the DuoScope is suitable for optics with tube diameters from 70mm to 90mm.
Suitable for counterweight bars of 20mm diameter.