|EX||Professional lens with high quality optics and robust build. Meets the highest standards and provides excellent performance and flawless image quality unachievable with traditional optical technologies.|
|DG||The lens is designed for full-frame SLR cameras but can be also used on APS-C SLR cameras.|
|HSM||The lens is equipped with ultrasonic motor to provide very fast and virtually silent autofocus. Learn more|
|Position in the lineup|
|Sigma 50mm F/1.4 DG HSM | A||Jan 2014||⊗|
|Sigma 50mm F/1.4 EX DG HSM||Mar 2008||⊗|
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|Maximum format:||35mm full frame|
|Diagonal angle of view:||46.8° (35mm full frame)
37.6° (Canon APS-H)
30.4° (Canon APS-C)
31.6° (Nikon APS-C)
31.6° (Pentax APS-C)
27.9° (Sigma APS-C)
31.6° (Sony APS-C)
|Lens construction:||8 elements in 6 groups, including 1 ASPH|
|Closest focusing distance:||45 cm|
|Number of diaphragm blades:||9|
|Type of autofocus motor:||Ultrasonic (Canon EF)
Ultrasonic (Minolta/Sony A)
Ultrasonic (Nikon F)
Ultrasonic (Pentax K)
Ultrasonic (Sigma SA)
|Full-Time Manual Focus:||Yes|
|Weight:||SA: 505 g|
|Maximum diameter x Length:||SA: Ø84.5 x 68.2 mm|
|Materials:||High-quality plastic barrel, metallic mount|
|Filter size:||77 mm|
Design and Features
A lens with such optical design that distinguish it from Canon’s older F/1.4 model:
- it incorporates molded glass ASPH element for better correction of aberrations,
- it has larger barrel to reduce vignetting.
Another distinctive feature of Sigma’s lens is the ring-type ultrasonic motor with conventional support of FTM which does not have the shortcomings of Canon's EF 50mm F/1.4 USM lens.
The lens barrel is of moderate weight, made of high-quality plastic. The lens mount is metallic. The lens barrel has a "crinkle" paint finish (refer to the article dedicated to Sigma 85mm F/1.4 EX DG HSM for more information about the finish). The lens is almost twice as heavy as EF 50/1.4 USM and has better build quality compared to the former.
The lens features AF/M focus mode switch.
|AF||Autofocus mode with Full-Time Manual Focus.|
|M||Manual focus mode.|
The lens uses front filters with standard size of 77 mm which are easy to find. However, filters of such size are more expensive and mainly used with professional lenses.
The filter thread does not rotate during focusing which allows convenient use of different types of filters (including but not limited to polarizing and gradient).
The lens uses all-group focusing however the optical system does not extend beyond the lens barrel during focusing.
The lens is equipped with ultrasonic motor, the autofocus is virtually silent and fast. Some people also find the autofocus of this lens to be inconsistent/inaccurate, but this is usually the result of one’s inability or inexperience in shooting at large apertures where this lens provides very narrow depth of field. Focus shift, which is typical for large aperture prime lenses, does not facilitate the task of autofocus system either. In such situation the autofocus errors are unavoidable even with professional DSLR cameras, especially in low-light conditions.
Aspherical elements (ASPH, XA) minimize spherical aberration, astigmatism, coma and ensure excellent sharpness and contrast even at maximum aperture.
The sharpness is very good at the center of the frame already wide open and excellent from F/2.8. The edges are mediocre at F/1.4-2, good at F/2.8, very good at F/4 and excellent from F/5.6. The background blur is smooth and pleasant at large apertures. The lens suffers from focus shift when stopped down though.
|Camera||Nikon D3X||Canon EOS 5D mark II|
|Sensor size||35.9×24 mm||36×24 mm|
|Distortion||-1.64 %||-1.67 %|
|Vignetting at F/1.4||-1.14 EV||-1.73 EV|
|User Manual. English, Adobe PDF, 227 KB|
|Prime lenses for Canon EOS DSLR cameras|
|Pentax lenses: compendium|
Alternatives (AF, 44..56 mm)
|Canon EF 50mm F/1.2L USM||2007||⊗|
|Canon EF 50mm F/1.4 USM||1993||⊗|
|Canon EF 50mm F/1.8||1987||⊗|
|Canon EF 50mm F/1.8 II||1990||⊗|
|Canon EF 50mm F/1.8 STM||2015||⊗|
|Canon EF 50mm F/1L USM||1987||⊗|
|Carl Zeiss Planar T* 50mm F/1.4 ZA SSM (SAL50F14Z)||2013||⊗|
|Sigma 50mm F/1.4 DG HSM | A||2014||⊗|
|smc Pentax-DA 50mm F/1.8||2012||⊗|
|smc Pentax-DA* 55mm F/1.4 SDM||2008||⊗|
|Sony 50mm F/1.4 (SAL50F14)||2006||⊗|
|Sony DT 50mm F/1.8 SAM (SAL50F18)||2009||⊗|
|Tamron SP AF 45mm F/1.8 Di VC USD F013||2015||⊗|