Full-frame shooting produces great results when combined with this Sony 28-135mmf/4 camera lens. This powered zoom lens is ideal for shooting videos thanks to its host of features that ensure super-quiet focusing and steady zooming. It starts with a constant f/4 circular aperture that maintains exposure throughout the entire zoom range, so you don't have to adjust lighting levels on the fly. When it's fully open, it has a circular aperture, creating rounded defocused points of light for smooth bokeh.This Sony 28-135mm f/4 camera lens alsohas an ultra-quiet wave motor so that the noise of zooming doesn't appear on thevideo soundtrack. Quiet floating motors are also used for the aperture and autofocus, and because they are contactless, there are no gears or couplings that create sounds.When you use this movie lens, take advantage of the SteadyShot image stabilization, which uses gyro sensors to precisely compensate for hand shake and vibrations. This produces a clearer image, one that remains sharp. In addition, the internal focusing mechanism ensures the end of the camera doesn't rotate, which is ideal when you're using a polarizing filter. Extra-low dispersion glass, Nano AR coatings and aspherical lens elements ensurethis Sony 28-135mm f/4 camera lens reduces ghosting, flare and chromatic effects. The Sony 28-135mm F4 Full-frame E-mount Power Zoom Lens has been created to satisfy professional optical and operational requirements for high-quality movie