Highlighted rows differ between the two models.
| Specification | Canon EF 28-105mm f/3.5-4.5 USM | Tamron SP 24-135mm f/3.5-5.6 AD Aspherical (IF) - Monture Canon EF |
|---|---|---|
| Mount | ||
| Mount | canon-ef | canon-ef |
| Optics | ||
| Focal (difference) | 28-105 mm | 24-135 mm |
| Aperture (difference) | f/3.5-4.5 | f/3.5-5.6 |
| Prime | No | No |
| Stabilization | No | No |
Pick Model B if you need the extra 4 mm at the wide end and the longer 135 mm reach for a modest 4 EUR premium. Model A stays the better choice if you prefer to save the money and don’t require the wider 24 mm or the extended 135 mm telephoto. Both share the same f/3.5 maximum aperture at the wide end, so optical brightness is identical where it matters most.