Suppose you have a converging lens with f=150 mm and place an object at d_o=250 mm.

a) find the image distance, d_i , using the thin-lens equation.

b) is the image real or virtual?

c) is it upright or inverted and what is its magnification?

For reference, the thin-lens equation is : 1/d_i + 1/d_o = 1/f