Image Formation By Convex Lens in Different Cases Case 1: Object at Infinity A point object lying on the principal axis: Rays come parallel to the principal axis and after refraction from the lens, actually meet at the second principal focus F2.Fig. Convex lens point object at infinity, image at focus. The image is formed at focus F2. It is real and point sized.A … [Read more...] about Image Formation by Concave and Convex Lenses