Orientation
Also called: north up, east left, mirror image, star diagonal.
Sky charts show north up and east left; telescopes rotate or mirror the view, so it may not match.
Facing south, east is on your left — so sky charts show east on the left, the reverse of a map of the ground. In the eyepiece it changes: a Newtonian or Dobsonian turns the view upside down (rotated 180°); a refractor, SCT or Maksutov with a star diagonal shows a mirror image. Binoculars and finders with prisms show it the right way up.
At the eyepiece
To work out where north is in the eyepiece, nudge the telescope towards Polaris: new stars enter the field from the north side.
In AstroPilot
AstroPilot's photos and eyepiece views are north up, east left.