hades wrote: For me it seems that you are too away from NCP, that's why the vector is out of the screen.

I'm late to the party on this one, but yes, I agree. I have an AstroTech AT6RC mounted on a Celestron CGX-L and have this problem routinel if I try to use the main scope for polar alignment; the FOV is just too narrow. The CGX-L doesn't have an integrated polar scope.

But... unless the focal length of your guidescope is rather long or your guide camera is really tiny, you should be able to get close enough to keep the NCP on screen. If not, follow the instructions the others gave you; pick a star and move it closer, then repeat. I often do this repeat even if I didn't have to move offscreen, just as a check of whether or not I did a good job vs maybe having bumped the scope while aligning....

Read More...