Stunning f/1.4 resolution in a mobile prime lens
Unsparing application of cutting-edge technology achieves refined G Master performance with consistently high resolution and soft, natural bokeh even at the widest F1.4 aperture setting. The lens is both compact and the lightest in its class1, maximising portability. It also offers fast, precise AF drive, top-level control and reliability. 
Advanced optical technology achieves spectacular resolution even at f/1.4
Two XA (extreme aspherical) elements in an optical design that meets stringent G Master requirements contribute to consistently high resolution throughout the image area. Three ED (Extra-low Dispersion) glass elements are also included to effectively suppress chromatic aberration. These innovative optical design that minimises sagittal flare so that point light sources are accurately reproduced. 
State-of-the-art optical design faithfully reproduces point sources
A new optical design incorporating two precision XA elements suppresses sagittal flare, a common aberration in large-aperture lenses. Sagittal flare can cause an unnatural spreading of point light sources that become more pronounced towards the image periphery.