Highlighted rows differ between the two models.
| Specification | Irix Blackstone 11mm f/4 - Monture Canon EF | Sigma 24mm f/1.8 EX DG - Monture Canon EF |
|---|---|---|
| Mount | ||
| Mount | canon-ef | canon-ef |
| Optics | ||
| Focal (difference) | 11 mm | 24 mm |
| Aperture (difference) | f/4.0 | f/1.8 |
| Prime | Yes | Yes |
| Stabilization | No | No |
Pick the Irix Blackstone 11mm if you need an ultra-wide perspective for landscapes, architecture, or tight interiors and can work with a slower f/4 aperture. Choose the Sigma 24mm if low-light performance, shallower depth of field, or a more versatile standard-wide focal length is a priority, despite the slightly higher price. The Irix stays the better choice if budget is tight and maximum wide-angle coverage is essential.