The Fujinon MK set for Sony E is a lightweight cinema zoom for Sony APS-C cameras and Super35 camcorders. Key features include: Fast T2.9 Aperture Parfocal with minimum focus breathing Geared controls for focus, iris and zoom Native Sony E-mount Featherweight. The first thing you’ll notice when you pick up the Fujinon MK lenses is that they are beyond light. Weighing in at just north of 2 pounds each means that this lens can be mounted without the need of an additional lens support apparatus when needed. It also makes it a prime candidate for gimbal work. High Quality Optics. The lenses feature a fast T2.9 clickless aperture, controlled by nine rounded blades. It is color matched to compliment higher end offerings from Fujinon, and the 28.5mm diameter image circle covers the APS-C / Super35 sensor format. Cine Style. Unlike many other Sony E-mount “cine” lenses, the MK set is a true cinema lens with a full cinema feature set. The focus, iris, and zoom rings all have a industry standard 0.8 gears. The focus ring gives you precise control over pulls and follows with 200° of rotation, while the iris ring is declicked with a smooth action allowing you adjust exposure mid-shot. There’s also back-focus tuning to keep what’s in focus precisely sharp and a macro adjustment to get up close and personal with any subject. Parfocal This term is thrown around a good bit, but many lenses that claim it are not truly parfocal. Instead, they’re close enough that many won’t notice. Well not this one. The MK18-55mm is a true parfocal lens.description