The Fujinon HA42x13.5BERD-S48 High-definition Telephoto Lens (EFP) is lightweight (5.4 kg) and portable with features such as QuickZoom, zoom limiter, internal focusing, and auto-cruise zoom. Internal focusing allows the lens to move the inner lens group without altering its length, thereby ensuring stability while focusing. With the auto-cruise zoom feature, you can set the speed to ensure a constant zoom.