Sigma 30mm f/1.4 DC HSM Art Lens for Canon
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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 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.
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|
|APS Equivalent||1.5x: 45mm; 1.6x: 48mm|
|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|
|Closest Focus||30cm / 11.8 in.|
|Magnification Ratio||0.15x / 1:6.8|
• Front Lens Cap
• Rear Lens Cap
• Lens Hood
• Carrying Case