Do you record video? The power zoom feature uses Handycam technology to deliver smooth zoom effects that are difficult to achieve manually. It's also silent, so your subjects won't be startled, and the built-in zoom arm ensures a constant zoom speed. The G-series lenses are known for their descriptive power and maintain excellent characteristics in peripheral light and maximum contrast, even at the edges of the image. Built-in optical SteadyShot image stabilization in the lens itself ensures smooth, blur-free images and videos when shooting handheld. Instead of a standard polygon-shaped aperture, this lens has a 7-blade circular aperture that gives a more natural, rounded blur effect or "bokeh". Aspherical lens elements minimize distortion, while (Extra-low Dispersion) ED glass elements provide superior contrast, resolution and color fidelity. An internal focusing mechanism means that the length of the lens remains constant, allowing for easy handling, fast autofocus and a short minimum focusing distance. The filter thread at the front of the lens also does not rotate - and this is an advantage in connection with the use of polarizing filters.