Highlighted rows differ between the two models.
| Specification | Sigma 18-125mm f/3.5-5.6 DC - Monture Canon EF-S | Sigma 18-200mm f/3.5-6.3 DC - Monture Canon EF-S |
|---|---|---|
| Mount | ||
| Mount | canon-ef-s | canon-ef-s |
| Optics | ||
| Focal (difference) | 18-125 mm | 18-200 mm |
| Aperture (difference) | f/3.5-5.6 | f/3.5-6.3 |
| Prime | No | No |
| Stabilization | No | No |
Pick Model B if you need the extra reach to 200 mm and can accept the slightly dimmer f/6.3 at the long end. Model A stays the better choice if you prefer a marginally brighter aperture at 125 mm and want to save a few euros. Both share the same wide-angle performance and mount compatibility.