A breakthrough F2 telephoto zoom for new expressionDeveloped for creators who want next-generation versatility and expression, this telephoto zoom is the world's first with a maximum focal length of 150 mm and F2 aperture. Deep bokeh works with telephoto compression for creative portraits, and the large aperture is ideal for indoor events. All of this plus internal zoom in an agile lens that weighs just 1340 g (47.3 oz., without tripod base).Resolution you'd expect from a high-quality prime lensInnovative optical design and manufacturing achieve unprecedented performance. Two precision Xa (extreme aspherical) elements in a state-of-the-art optical design plus meticulously controlled aberration deliver breathtaking resolution at all apertures, including F2. Two Super Ed (Extra-low Dispersion) and three Ed glass elements minimise chromatic aberration, while Nano Ar Coating Ii suppresses flare and ghosting.