Please make sure you are starting with the lowest power (highest focal number) eyepiece and looking at an object that is over 100 feet away.

If your telescope includes an erecting prism, make sure it’s inserted before the eyepiece. If your telescope come with a Barlow lens, you should not be using it until AFTER you focus on an object.

Turn the focus knob very slowly through the full range, and the object should come into focus.