Ultrafast Prime Lens - Shallow depth of field and high-quality bokeh for sharp, in-focus imagery with clear subject isolation; Quick and Accurate Autofocus - Supports eye and object tracking even when the subject is in motion; ideal for photographers and videographers; STM Motor - Ensures a quiet autofocus experience with minimal focus breathing, crucial for videographers; Formatted for APS-C-size Sensors - 35mm full-frame equivalence suitable for street photography, travel, indoor architecture, and wider scenes; High Refractive Elements - Reduced size while enhancing optical performance and minimizing flare and ghosting; 11-Blade Aperture Diaphragm Design - Contributes to the lens' soft, appealing bokeh