My 114SLT/130SLT telescope gives tilted views when I’m looking at terrestrial (ground) scenes. What’s wrong?

There is nothing wrong. These scopes are Newtonian reflectors that normally provide inverted views–as they are designed for astronomical use. 

On the SLT reflector telescope tubes (OTAs), there is a metal bar (the dovetail bar) that is used to hold the tube to the mount arm. The bar is attached to the tube at a 45° position to conveniently position the eyepiece for astronomical viewing.

Because of this 45° orientation, the images viewed through the OTA will be tilted when the scope is used to observe any terrestrial scenes.

Updated 12/27/13