Canon EF 24-70mm f/2.8L II USMMTF Chart What is an Aspherical Element? An aspherical element is a free-curved internal component within your lens that corrects the distortion caused by the curvature of the spherical lens elements.These components are only found in professional quality lenses.Aspherical aberration produced with a standard lens can be avoided by using a higher quality lens with additional aspherical elements.The EF 24-70 f/2.8L II USM has three aspherical elements to separately counteract each of the individual internal aberrations, so your images are exceptionally sharp.Sample Image: