What is the main difference between a refracting telescope and a reflecting telescope? a refracting telescope uses a concave lens to collect light; a refracting telescope uses a concave mirror to collect light. a refracting telescope uses a convex lens to collect light; a refracting telescope uses a convex mirror to collect light. a refracting telescope uses a convex lens to collect light; a refracting telescope uses a concave mirror to collect light.