Reading Time: 4 minutesWhat is A parfocal lens? Definition & Meaning A parfocal lens is a zoom lens that stays in focus when you change the focal length. This means you can adjust framing without needing to refocus. The subject stays sharp throughout the movement. This is different from a varifocal lens, which shifts the focus as you… Continue reading What Is a Parfocal Lens? What It Is & Why It Matters