Sigma 30mm F1.4 DC HSM Art Lens For Sigma DSLR Cameras
The Sigma lens is a prime lens designed for Sigma APS-C format cameras.
Its 35mm focal length equivalent is 45mm which places it in the category
of standard focal length lenses. With its particularly fast maximum
aperture of f/1.4, the lens will perform very well in low light
situations and provides shallow depth of field focus. With updated
optical configurations (9 elements in 8 groups), as well as rounded
aperture blades, the lens delivers sharp detail and nice background
bokeh. Its minimum focus distance is 11.8" (30 cm). A Hyper Sonic
Autofocus Motor (HSM) offers fast, smooth and quiet autofocus. The lens
optimized light distribution helps to minimize field curvature
preventing a loss of image quality at the edges of photographs and its
double-sided aspherical lens element minimizes spherical distortion.
A rear focusing system combined with a newly developed
autofocus algorithm and Hyper Sonic Motor provide smooth and accurate
autofocus. Fulltime manual focus is also supported. As part of Sigma's
"Art" line of lenses it is compatible with Sigma's USB Dock, which
enables firmware updates and focusing adjustments. The lens is
constructed with Thermally Stable Composite Material (TSC) which
performs well in extreme temperatures, reducing the expansion and
contraction of the internal lens barrel.