Refracting telescope question?

Question

Which lens in a refracting telescope inverts the image -- the objective lens or the eyepiece?

Answer 1

The objective lens inverts the image.  This is easy to verify by removing the eyepiece and slipping a piece of thin paper in the focal plane.  You can also use the eyepiece by itself as a magnifier to show that the eyepiece does not invert the image.

Answer 2

The objective lens forms an image that is inverted.  The eyepiece looks at the inverted image and focuses it on your retina.