This post compiles annotated links to Sigma 30mm f/1.4 EX DC HSM (Canon mount) professional and user reviews, sample photos and references.

Sigma 30mm f/1.4 EX DC HSM Lens for Canon Digital SLR Cameras
Sample images
From DPReview.com
Canon XS / 1000D review gallery
The Sigma 30mm f/1.4 lens was used for the following Canon XS / 1000D images (be sure to click the file name under the photo to download the original photo)
- 2 musicians: ISO 1600.
- Three musicians: ISO 1600
- Morland Abingdon plaque on brick wall: ISO 100
- Punts: ISO 100
- More punts: ISO 100
- High-contrast sidewalk: ISO 100
- Brick wall and tower: ISO 100
- Parked bicycle: ISO 100