Reviews and Problems with Sigma 30mm F1.4 EX DC /HSM
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Sigma 30mm F1.4 EX DC HSM Lens Review
SLR Lens and Camera Reviews
6 June 2009
Summary: Sigma 30mm f/1.4 EX DC HSM is currently the only wide angle prime that was specifically designed for APS-C sensors and as such it has no direct competition. Nevertheless, users should carefully review the benefits this lens provides versus the more traditional FF type wide angles. On the positive side we have pretty decent center image performance, low levels of vignetting, good build quality along with affordable price.
Conclusion: This is a ‘standard’ lens for a cropped digital SLR. 25 years ago, all SLR’s came with a ‘standard’ lens and everybody learned how to use one. Those lenses, at 50mm, are still about but don’t have the versatility that they had on a 35mm film camera. This 30mm offering from Sigma is a brave move forward that takes a backward step! It makes a lot of sense.
Pros: Fast aperture, Picture quality, Consistent performance, Fast autofocus
Excerpt: Originally published October 2005. WHAT YOU NEED TO KNOW: The first high-speed "normal" lens for digital SLRs with APS-sized sensors, this 30mm f/1.4 is Sigma's first nontele lens to incorporate elements of SLD (Special Low Dispersion) glass. (SLD elements promise improved control of chromatic aberration.) The lens also has an all-glass aspheric element, in addition to a more common glass/resin hybrid aspheric.
Excerpt: With a price-tag that is only just shy of £300, Sigma's 30mm optic is on the pricey side for a 'standard' lens and with good reason since it comes with an exceptionally fast f1.4 maximum aperture...
Conclusion: I’m glad we’ve reached a moment in which the test of this lens, on all five mounts, appeared at our website. Its presence is important for a few reasons. First of all, it’s one of the few lenses which can be enjoyed by owners of all DSLRs with small sensors, thus making the comparison of the results obtained on different detectors very instructive. Second of all, the fact of using this lens when doing our camera tests made its thorough test a compulsory thing.
Cons: poor image quality at the edge of the frame,, random accuracy of focus mechanism,, chromatic aberration should be slightly smaller,, too high distortion for these lens parameters,, very large astigmatism,, noticeable coma.
Excerpt: Sigma's 30mm f/1.4 EX DC HSM is a useful prime lens for the D-SLR owner with a cropped format APS-C type sensor. Essentially it takes on the role of prime standard lens, effectively offering 45mm (1.5x), 48mm (1.6x) or 60mm (2x) - depending on which camera you use it with. The lens comes in mount fittings for Sigma, Canon, Nikon, FourThirds, Sony and Pentax D-SLRs.