Questar telescope, 3 1/2”. Decent optics - lenses seem clear. Can’t get motor to run - the one which turned the telescope to compensate for earth’s rotation. These are $5,000 new. A service is $500. And, there is an upgrade on the motor to a digitally controlled one, called “Powerglide.” So, this can be quite a deal for someone who knows enough about them. This was from a deceased relative, and I no longer have interest. Comes with the accessories, two eyepieces, tripod, some sort of filter. Pelican 1550case.