Since real images can only be seen on screen why are we able to see it on the lens. Will it not be called virtual?
If you are looking through the lens, what you see is a virtual image. Used as a simple magnifier, a convex lens lets you bring the object close to the lens giving it a large angular size, while putting the virtual image in focus out beyond your near point (and not “on the lens”). On an optical bench, a small light bulb and a screen work better than pins for locating a real object and image.