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 in 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

  1. ↑ "Sigma Corporation announces pricing and availability for 30mm F1.4 DC HSM, 30mm F2.8 DN and 19mm F2.8 DN lenses" (Press release). Sigma Corporation of America. March 8, 2013. Retrieved July 25, 2013.
  2. ↑ www.photozone.de - Test Report/Review
  3. ↑ the-digital-picture.com - Sigma 30mm f/1.4 EX DC HSM Lens Review
Four Thirds System lenses timeline
Wide-angle Standard Telephoto Super Telephoto
4.57891011121417.518 202224253035404245 505455607090100105125135150 180200250300400500800
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
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