Optimized features not only for outstanding still images but also for video shooting. Standard zoom angle of view from 24mm wide-angle to 70mm short-telephoto. A bright maximum aperture of F2.8 throughout the entire zoom range. Features weather sealing at 7 spots on the lens to protect from light dust, rain, and snow and provide the ability to capture stunning images in less than perfect conditions. Custom Switch - There is a custom switch, which can be set to allow adjustment of the aperture silently by rotating the focus ring. Using the optional Lens Station, you can set up the mode to suit your own preference.