The Sony E 18-105mm f/4 G PZ OSS is a power zoom lens designed for Sony E-mount cameras and camcorders. Key features include: Excellent image quality Four-stop Optical SteadyShot image stabilization Constant f/4 aperture Smooth, quiet zoom functionality G-Series Zoom. Being the first G-series lens with a native E-mount, the 18-105mm offers a focal length equivalent to 27-158mm after sensor crop. Constant f/4 Aperture. With its f/4 throughout the zoom range, the 18-105mm is great for both video and still shooters alike. PowerZoom. Sony’s Handycam technology and floating axis design provide smooth and quiet zooming, making this lens a perfect choice movie recording. Its zoom lever allows greater control over zoom speed using either variable or fixed-speed settings. Optical SteadyShot Image Stabilization. The in-lens optical stabilizer provides up to four stops of stabilization, letting users hand-hold slower shutter speeds. Advanced Optical Design. Two extra-low dispersion elements and three aspherical elements help to reduce chromatic aberrations and distortion throughout the zoom range while also contributing to overall image sharpness and clarity.description