Parfocal zoom refers to a lens that retains focus on an object as the focal length changes. This means that you can zoom in or out on a subject without having to constantly adjust the focus. Parfocal zoom lenses are essential for videography because they allow for smooth, seamless transitions between shots. Without a parfocal zoom lens, the focus would shift as you zoom, which would be jarring and distracting for viewers. Parfocal zoom lenses […]