Prime 30mm lens (equivalent to 45mm on a 35mm format)
Fast f/1.4 maximum aperture
HSM (Hyper-sonic Motor) for quiet auto-focusing
Angle of view of 50.7 û
Super Multi-Layer Coating
Thermally Stable Composite (TSC) material
Rear focusing system
9-blade rounded aperture diaphragm
9 elements arranged in 8 groups
30mm f/1.4 DC HSM Prime Lens
30mm f/1.4 DC HSM Prime Lens offers almost the same perspective as that of the human eye, because when mounted on an APS-C DSLR the focal length becomes a 35mm format equivalent of 45mm. The lens encompasses SigmaÕs HSM (Hyper-sonic Motor) technology for super silent auto-focusing, Super Multi-Layer Coating to suppress ghosting and flares, Thermally Stable Composite (TSC) materials to ensure that the lens does not expand or contract due to heat or freezing and a rear focusing mechanism. The lens has a 9-blade rounded aperture diaphragm and a total of 9 elements arranged in 8 groups.
Placed under the Art category, this large-aperture standard lens with an angle of view equivalent to 45mm on a 35mm camera is a superb go-to lens for artistic photography on an APS-C format digital SLR. Offering the bright F1.4 aperture and an angle of view extremely close to that of human vision, this lens is ideal for many different types of photography. Equipped with the latest in lens technology, the 30mm 1.4 lens boasts a Hyper Sonic Motor (HSM), Super Multi-Layer Coating and a design featuring Thermally Stable Composite Material (TSC). The HSM ensures quiet, accurate and high-speed autofocus; the Super Multi-Layer Coating reduces flare and ghosting, while the TSC reduces expansion and contraction of the internal lens barrel. A rear focus system prevents focus-dependent variation in aberration, making high-level image quality possible throughout the entire image. With their unchanging barrel length, these lenses also enhance balance and stability for the photographer. An optimized autofocus achieves a smoother focusing. The 30mm 1.4 has a minimum focusing distance of 11.8in and a maximum magnification ratio of 1:6.8. A 9 blade rounded diaphragm creates beautiful bokeh. Under the Global Vision standard, every lens will be tested before shipping using the Sigma A1 MTF system to ensure the highest degree of quality possible.
USB Dock Compatibility
Sigma has developed special software (SIGMA Optimization Pro) that can update the lens firmware and adjust parameters such as focus.
9 Elements in 8 Groups
Angle of View
Number of Diaphragm Blades
Minimum Focusing Distance
30 cm / 11.8 in
Filter Size (mm)
Dimensions (Diameter x Length)
435g / 15.3 oz.