Can a concave lens ever form a REAL image?

Question

One of my friends told me that a concave lens can form a REAL image of a VIRTUAL object.
I did not understand wat she said.

Answer 1

OK, I was all set to say no until I read the rest of the question. Yes, a negative lens could form a real image of a virtual object, kind of. For example, if a positive lens forms an image at it's focal point, say 10 inches in front of the lens, then a negative lens could be placed closer to that positive lens than 10 inches, say 5 inches. and it would simply move the image farther away, maybe 20 inches from the positive lens and 15 inches from the negative lens. This is precisely what a Barlow lens does in a telescope. It is a negative lens used to increase the effective focal length of the telescope.

Answer 2

nope