Part of the high-performance ‘Art Series’, the Sigma 35 mm f/1.4 DG HSM A Standard Prime Lens provides incredible artistic expression with superb optics, for professional and serious amateur photographers. Advanced optical design As the first release of Sigma’s Art category, the 35 mm f/1.4 DG HSM A is the most complex in its class.The 13 element, 11 group construction includes four elements made from Super-Low Dispersion (SLD) glass, ‘F’ Low Dispersion (FLD) glass, which has performance equal to fluorite and two aspheric elements.This helps to minimize and correct both the chromatic aberration of magnification and axial chromatic aberration to achieve ultra-high quality images.Large apertureSigma has a reputation for producing high-performance lenses by incorporating the latest optical techniques.The f/1.4 DG HSM A is the fourth lens of its kind that achieves extraordinary expressive power with a maximum aperture of f/1.4 so your photography benefits from excellent brightness even in the poorest light conditions.HyperSonic MotorThe HSM (HyperSonic Motor) ensures fast and quiet autofocus with full-time manual override. The enhanced AF algorithm gives you smoother autofocus which can be overridden anytime by rotating the focus ring.This drives a floating inner focus system that effectively compensates for astigmatic and spherical aberration, designed to maintain high optical performance for all subject distances, including extreme close-up photos.Reduced flare and ghostingSuper Multi-Layer Coating is used to reduce flare and ghosting. Combined with an optical design engineered to resist strong incident light, the f/1.4 DG HSM A provides sharp, high contrast images even in backlit conditions.Blur effectThe diaphragm effectively uses 9 rounded blades to create an attractive bokeh effect in the out of focus areas of the image. As a result, you can achieve beautifully expressive photos with artistic peripheral distortion.Meet the demand of high-end photography. With excellent image quality, professional-grade optics and flawless operation, the Sigma 35 mm f/1.4 DG HSM A Standard Prime Lens delivers on performance at an ultra competitive price.