Sigma 30mm f/1.4 DC HSM Art Lens for Canon

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Item: 319690
Manufacture: Sigma
Condition: New
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Price: $489.00 $599.00
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The new Sigma 30mm prime lens takes 62mm filters like its predecessor does, and weighs just slightly more. And like most Sigma lenses, this one is available for a nice, budget-friendly price of around $499 and ships with front and rear caps, a lens hood and a soft case.

Overall, the Sigma 30mm ƒ/1.4 DC Art produces very sharp images. Wide open at ƒ/1.4, images are a little soft except for in the dead center of the frame, however, when compared to its predecessor, the new Art-Series model shows vastly improved performance at max aperture. Stopping down to ƒ/2.8 shows a significant increase in sharpness, and it stays very sharp throughout the aperture range with only minor diffraction softness at ƒ/16.

Chromatic Aberration 
Chromatic aberration is not really a significant issue with this lens, and it looks fairly similar to the older model in this regard, if only slightly worse. At ƒ/1.4, both models averaged around 300ths of a percent of frame height, and while the older model averaged around a more or less constant value, the new version shows an increase in CA as you stop down to just around 600ths of a percent at ƒ/16.

Shading (''Vignetting'') 
Unlike CA, vignetting has been much improved in this new model compared to the older one. While both models displayed about half of a stop of light falloff wide open, the new model shows a sharp decrease to nearly zero light loss by ƒ/2.8, and remains at that level throughout the rest of the aperture values. The older model, on the other hand, showed a slow, steady decrease in CA, but even by ƒ/8, the older version had more vignetting than the new one does at ƒ/2.8.

Name Sigma 30mm ƒ/1.4 DC HSM Art
Image Circle APS-C
Type Standard Prime
Focal Length 30mm
APS Equivalent 1.5x: 45mm; 1.6x: 48mm
Max Aperture ƒ/1.4
Min Aperture ƒ/16
Diaphragm Blades 9 (rounded)
Lens Construction 9 elements in 8 groups, including 1 aspherical element, Super Multi-Layer Coating
Diagonal Angle of View(Based on image circle) 50.7 degrees
Focus Details Rear focusing system with HSM (Hyper Sonic Motor)
Front Element Rotation No
Zoom System n/a
Closest Focus 30cm / 11.8 in.
Magnification Ratio 0.15x / 1:6.8
Filter Size 62mm

• Front Lens Cap
• Rear Lens Cap
• Lens Hood
• Carrying Case
• Brand New Factory Fresh Import Model