Sigma AF 30mm f/1.4 EX DC HSM - Review / Test Report
Lens Reviews - Canon EOS (APS-C)

Review by Klaus Schroiff, published October 2005

Special thanks to Andreas Thaler for providing the lens for testing purposes!


The AF 30mm f/1.4 EX DC HSM is one of Sigma's Digital Camera lenses designed specifically for APS-C DSLR. It has a reduced image circle so it's not compatible to 1.3x or full-frame (D)SLRs. Its field-of-view as well as the high speed resembles classic standard lenses (50mm) on full-frame camera. It's the first dedicated standard fix-focal lens for APS-C though the gap has been filled by classic 28mm and 35mm fix-focals to some degree. The lens is available in Canon EF, Nikon and Sigma SA mount so far.

The optical construction is made of 7 elements in 7 groups with one SLD element (Special Low Dispersion), one high quality ELS element (Extraordinary Low Dispersion)and one aspherical element. Its minimum focus distance is 0.4m resulting in a max. object magnification of 1:10.4 - fairly unimpressive here. The aperture mechanism has 8 aperture blades. The filter size is 62mm. In absolute terms it is a fairly compact lens with a size of 77x59mm but unlike traditional standard lenses the AF 30mm f/1.4 EX is comparatively heavy with at 430g.

The construction feels very solid with the typical EX ("Excellence") finish (crinkle style). The very broad, rubberized focus ring has a smooth action. The front element does not rotate so using a polarizer is no problem. The focusing speed is pretty fast and thanks to HSM the AF noise level is very low. Full-time manual focusing is possible.

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