1. The problem statement, all variables and given/known data A converging lens (convex lens) creates an image that is 2 times the size of the object. The object is placed: 2. Relevant equations -di/do = hi/ho 1/f = 1/di + 1/do 3. The attempt at a solution I thought the answer was that the object is place two focal lengths in front of the lens. But the answer says its half a focal length in front of the lens. I mean: -di/do = hi/ho = 2 -di = 2do 1/f = 1/di + 1/do = -1/2do + 1/do = 1/2do f = 2do Isn't f=2do saying two focal lengths?