Sigma 50mm f/1.4 EX DG HSM lens

50mm f/1.4 EX DG HSM

Maker	Sigma Corporation
Technical data
Focal length	50mm
Aperture (max/min)	f/1.4 - f/16
Close focus distance	45 cm / 17.7 in.
Max. magnification	1:7.4
Diaphragm blades	9
Construction	8 elements in 6 groups
Features
Short back focus	No
Ultrasonic motor	Yes
Lens-based stabilization	No
Macro capable	No
Application	normal prime/portrait
Physical
Max. length	68.2mm / 2.7 in.
Diameter	84.5 mm / 3.3 in.
Weight	505 g / 17.8 oz.
Filter diameter	77 mm
Accessories
Lens hood	Petal
Angle of view
Diagonal	45.8°
History
Introduction	2008
Retail info
MSRP	$730.00 USD USD

The Sigma 50mm f/1.4 EX DG HSM is a normal prime lens made by the Sigma Corporation.

The lens is produced in Canon EF mount, Four Thirds System, Nikon F-mount, Pentax K mount, Sigma's own SA mount, and the Sony/Minolta AF Mount varieties, all have the same optical formula.

Technical information

The Sigma 50mm f/1.4 EX DG HSM is constructed with a plastic body and a metal mount. This lens features a distance window with depth of field scale. A nine-blade, maximum aperture of f/1.4 gives the lens the ability to create shallow depth-of-field effects. The optical construction of this lens contains eight lens elements, including one aspherical lens element. This lens uses a front extension focusing system, powered by a ring USM motor. Auto-focus speed of the lens is moderate; it is not as fast as most ring USM lenses. The front of the lens does not rotate, but does extend when focusing. The lens is designed so that the outer body barrel is longer than the inner lens barrel, when the inner lens barrel is at its longest extension. This results in the lens maintaining the same overall length no matter where the point of focus lies.^[1]

When used on a digital crop body with a field of view compensation factor of 2× (Four Thirds body), it provides a field of view equivalent to a 100 mm lens mounted in a 35 mm body. In a 1.6× body, such as the Canon EOS 7D, it provides a narrower field of view, equivalent to an 80 mm lens mounted on a 35 mm frame body. With a 1.5× body such as the Nikon D300, it provides a less narrow field of view, equivalent to a 75 mm lens mounted on a 35 mm frame body. With a 1.3× body such as the Canon EOS-1D Mark III, it provides an even less narrow field of view, equivalent to a 65 mm lens mounted on a 35 mm frame body.

Advantages & Problems

This lens has shown to have lower vignetting than other Canon 50mm lenses.^[2] It has been reported that quality control problems lead to some copies of this lens having problems attaining proper focus when using auto focus.^[3]

See also

• List of Nikon F-mount lenses with integrated autofocus motors

References

External links

Wikimedia Commons has media related to Sigma 50mm F1.4 EX DG 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).

http://www.bythom.com/Sigma-50-HSM-lensreview.htm