Sigma 30mm f/1.4 EX DC HSM lens

Sigma 30mm f/1.4 EX DC HSM

Maker	Sigma Corporation
Technical data
Focal length	30 mm
Aperture (max/min)	f/1.4 - f/16
Close focus distance	40cm / 15.7in
Max. magnification	1:10.4
Diaphragm blades	8
Construction	7 elements / 7 groups
Features
Short back focus	No
Ultrasonic motor	Yes (not available with Pentax and Sony mount)
Lens-based stabilization	No
Macro capable	No
Application	interiors/portrait
Physical
Max. length	59mm / 2.3in
Diameter	75.5mm / 2.9in
Weight	430g / 15.2oz.
Filter diameter	62mm
Accessories
Lens hood	Petal Hood
Angle of view
Horizontal	43.6(1.5x), 41.1 (1.6x)
Vertical	29.9 (1.5x), 28.1 (1.6x)
Diagonal	51.4(1.5x), 48.5 (1.6x)
History
Introduction	2006

Sigma 30mm f/1.4 EX DC HSM mounted on a Canon EOS 40D, hood attached.

The Sigma 30mm f/1.4 EX DC HSM is a wide-aperture photographic lens made by the Sigma Corporation, equipped with Hyper Sonic Motor (abbreviated HSM, Sigma's trade name for photo lens focusing technology using ultrasonic motor). The lens was produced in Canon EF mount, Four Thirds System, Nikon F-mount, Pentax K mount, the SA mount, and the Sony/Minolta AF Mount varieties, all of the same optical formula. It shipped with a removable petal-type lens hood (62mm diameter). The lens assumes a crop factor of roughly 1.5, and therefore is not usable with on full-frame or 135 film cameras.

In 2013, Sigma announced that the lens would be replaced by a redesigned model designated as the Sigma 30mm f/1.4 DC HSM A; the new lens went on sale in March of that year in Canon, Nikon, and Sigma mounts.^[1]

Its large aperture allows for a shallow depth of field, allowing good isolation of close subjects. On APS-C sensor cameras, its field of view equivalent to that of a 46mm lens (Nikon DX, Pentax, Sony, current Sigma bodies), 48mm lens (Canon), 51mm lens (older Sigma bodies) or 60mm lens (Four Thirds). On the Four-Thirds mount, it is the only affordable normal, large aperture lens, therefore it is popular lens on that format.

Optical properties

Center resolution

The Sigma 30mm f/1.4 EX DC HSM lens has unusual optical properties. With most photographic lenses, vignetting is drastically reduced by stopping down the aperture by about 1 f-stop. This lens has a more linear response to stopping down the aperture. To reduce vignetting by about one half, it is required to stop down the aperture by over 3 full f-stops. The optical resolution properties of this lens are also unique. Most lenses are typically sharp in the center of the image frame, and softer in the edges. This problem is typically solved by stopping down the lens. This lens has little response to such an effort. When stopped down by over 4 stops, the edges of the frame are still soft. However, the center resolution of the lens is high when used wide open, and becomes exceedingly high when the lens is stopped down.^[2][3]

See also

• List of Nikon compatible lenses with integrated autofocus-motor

References & External links

• Sigma 30mm F1.4 EX DC HSM page on the corporate website.
• Sigma 30mm F1.4 EX DC HSM image samples on pbase.com

External links

Wikimedia Commons has media related to Sigma 30mm F1.4 EX DC HSM.

Four Thirds System lenses timeline

Wide-angle Standard Telephoto Super Telephoto 4.5 7 8 9 10 11 12 14 17.5 18 20 22 24 25 30 35 40 42 45 50 54 55 60 70 90 100 105 125 135 150 180 200 250 300 400 500 800 2003 Olympus Zuiko Digital 14-54mm F2.8-3.5 Olympus Zuiko Digital 50mm F2.0 Macro Olympus Zuiko Digital 50-200mm F2.8-3.5 2004 Olympus Zuiko Digital 11-22mm F2.8-3.5 Olympus Zuiko Digital 14-45mm F3.5-5.6 Sigma 18-50mm F3.5-5.6 DC Sigma 18-125mm F3.5-5.6 DC Olympus Zuiko Digital 40-150mm F3.5-4.5 Sigma 55-200mm F4-5.6 DC Olympus Zuiko Digital ED 150mm F2 Olympus Zuiko Digital ED 300mm F2.8 2005 Olympus Zuiko Digital ED 7-14mm F4 Olympus Zuiko Digital 17.5-45mm F3.5-5.6 Olympus Zuiko Digital 35mm F3.5 Macro Olympus Zuiko Digital ED 35-100mm F2 Olympus Zuiko Digital ED 90-250mm F2.8 2006 Olympus Zuiko Digital 8mm F3.5 Olympus Zuiko Digital ED 14-42mm F3.5-5.6 Leica D Vario-Elmarit 14-50mm F2.8-3.5 ASPH Sigma 18-50mm F2.8 EX DC Olympus Zuiko Digital ED 18-180mm F3.5-6.3 Sigma 24mm F1.8 EX DG Sigma 30mm F1.4 EX DC HSM Olympus Zuiko Digital ED 40-150mm F4-5.6 Sigma 50-500mm F4-6.3 EX DG HSM Sigma 105mm F2.8 EX DG Macro Sigma 150mm F2.8 EX DG APO Macro HSM 2007 Olympus Zuiko Digital ED 12-60mm F2.8-4 SWD Leica D Vario-Elmar 14-50mm F3.8-5.6 ASPH Leica D Summilux 25mm F1.4 ASPH Olympus Zuiko Digital ED 70-300mm F4-5.6 Sigma 135-400mm F4.5-5.6 DG APO Sigma 300-800mm F5.6 EX DG HSM APO 2008 Olympus Zuiko Digital ED 9-18mm F4-5.6 Sigma 10-20mm F4.0-5.6 EX DC HSM Olympus Zuiko Digital ED 14-35mm F2 SWD Olympus Zuiko Digital 14-54mm F2.8-3.5 II Leica D Vario-Elmar 14-150mm F3.5-5.6 ASPH Olympus Zuiko Digital 25mm F2.8 Sigma 50mm F1.4 EX DG HSM Olympus Zuiko Digital ED 50-200mm F2.8-3.5 SWD 2009 Sigma 70-200mm F2.8 EX DG Macro II HSM 20?? Sigma 4.5mm F2.8 EX DC HSM Sigma 10mm F2.8 EX DC HSM Sigma 50-150mm F2.8 II APO EX DC HSM Green background indicates lenses with image stabilization. Red background indicates unconfirmed lenses (rumors, please edit).