Fast-Aperture Short Tele. The Sigma 105mm f/1.4 DG HSM Art for Sony’s fast aperture gives you great performance in low light and extensive control over depth of field. The rounded nine-blade aperture gives you super-smooth bokeh, making this lens a great choice for portrait work. Using a APS-C sensor camera? You’ll have a focal length equivalent to 157.5mm.

High Image Quality. As a part of Sigma’s Art lens line, this lens goes through Sigma’s rigorous A1 testing to ensure high image quality. The 105mm f/1.4’s optics are quite impressive. Three “F” Low-Dispersion elements, two SLD glass elements, and one aspherical element correct for chromatic aberrations while ensuring high image sharpness, clarity, and contrast. A Super Multi-Layer Coating minimizes lens flare and ghosting to help produce high-contrast, color-accurate images.

Hyper Sonic Motor Autofocus System. The HSM autofocus system provides fast, smooth, and quiet operation in a wide variety of shooting situations. You can also manually override the autofocus motor at any time by rotating the focusing ring, giving you quick fine-tuning ability.

Durable Build. Sigma’s Art 105mm is weather sealed, making it dust and splash resistant. It’s made of a Thermally Stable Composite (TSC) material, giving it greater precision and allowing for use in a wide array of temperatures.