The Sigma 40mm F1.4 Art DG HSM Lens embodies the optical qualities of cine lenses while maintaining a compact form factor of consumer camera optics. Made for full-frame Sony E mirrorless cameras, the lens design comprises 16 optical elements arranged in 12 groups. The inclusion of three FLD and SLD elements brings down the effects of color fringing and spherical distortions. With the Hyper Sonic Motor AF, you can quickly focus down to a minimum distance of 15.7 inches while remaining silent. The autofocus settings can be manually overridden to obtain critical focus on objects in the cluttered scenery. This Sigma prime lens has a 9-blade electromagnetic diaphragm that improves the depth of field by creating rounded bokeh. The maximum aperture of f/1.4 allows you to take well-illuminated pictures in low light. You can use the lens inclement weather as it is resistant to dust and water splashes.