| Sigma 30mm f/1.4 EX DC Specifications | |
| Frame Coverage | APS-C |
| Lens Construction (groups) | 7 |
| Lens Construction (elements) | 7 |
| No. of Diaphragm Blades | 8 |
| Minimum Aperture | 16 |
| Closest Focusing Distance | 0.4m (15.7") |
| Maximum Magnifcation | 0.10x |
| Filter Diameter | 62mm |
| Maximum Diameter x Length | 75.5mm x 59mm (2.97" x 2.3") |
| Weight | 430g (15.2oz) |
Reviews
Source
Ken Rockwell
If you need a full f/1.4 in a normal focal length for a digital camera (normal for a digital SLR is 28mm, not 50mm), can work around some repeatable autofocus inaccuracy and want to spend about $400, this is your lens.
Digital Grin
Both lenses are pretty darned sharp wide open, considering that they are, well, wide open. For center sharpness, the Canon may have a slight edge at f/1.8, but either lens is admirably resolving details by f/2.8. Corner sharpness is a different story, with the 28mm turning in generally superior performance. Both lenses exhibit fairly soft corners wide open (although more than adequate, especially considering these lenses' primary use as available-light shooters).
WhichLens.com
The Sigma is a superb lens. It is better than the Canon EF 35mm f/2 and definitely satisfies my requirements for a prime lens in this range. However, one must not forget that the Canon is just over half the price of the Sigma and as always in the lens world, you get what you pay for. The Canon is still an excellent value for those looking to get into primes.
The-Digital-Picture.com
The Sigma 30mm f/1.4 EX DC HSM Lens is somewhat soft wide open and steadily improves to quite sharp at f/2.8. Corner sharpness trails center sharpness by a stop or two. Bokeh from the 8-blade aperture is nice. Colors are decent. CA (Chromatic Aberration), though not absent, is well controlled.
FocalPlane.net
If you want maximum sharpness or also want to use the lens on a full-frame camera, the Canon may be for you. If, like me, you want all the aperture you can get and won't notice an ever-so-slight loss in sharpness, the Sigma gets the nod.
Photodo.com
The picture quality alone, putting all the acquired knowledge of digital capture from the last few years into a simply constructed lens will pay dividends for those of you who purchase this lens.
PhotoZone.de
Sigma AF 30mm f/1.4 EX HSM DC may perform pretty good in absolute terms but for a fix-focal the lens disappoints a little. The center performance is exceptionally high but the borders are not all that impressive.
