The Sony SELP18110G 18-110mm (6.1x) Super 35mm/APS-C format power zoom lens, built for 4k moviemaking. Constant F4 maximum aperture throughout the zoom range for flexible operation. SMO (Smooth Motion Optics) Minimized focus breathing, ramping and axial displacement. Wide ratio (6.1x) 18-110mm Super 35 / APS-C power zoom lens High-quality G-Lens optical design - ideal for 4K moviemaking . SMO Minimized focus breathing, ramping and axial displacement. Constant F4 max aperture maintains exposure and depth of field . Servo / manual mechanical zoom w switchable zoom ring direction. Independent Zoom, Focus and Iris rings for superior control. Inner focus and zoom with dust and moisture resistance . Silent Iris and linear AF drive system for quiet operation. Optical SteadyShot image stabilization for video and stils. Extend your focal reach w/ 1.4x and 2.0x teleconverters.