Highlighted rows differ between the two models.
| Specification | Tamron 28-200mm f/2.8-5.6 Di III RXD - Monture Sony FE | Tamron 28-300mm F/4-7.1 Di III VC VXD - Monture Sony FE |
|---|---|---|
| Mount | ||
| Mount | sony-fe | sony-fe |
| Optics | ||
| Focal (difference) | 28-200 mm | 28-300 mm |
| Aperture (difference) | f/2.8-5.6 | f/4.0-7.1 |
| Prime | No | No |
| Stabilization (difference) | No | Yes |
| Build | ||
| Weight (g) (difference) | 576,000 g | — |
Pick Model A if you prioritize a brighter f/2.8 maximum aperture at the wide end for low-light performance and shallower depth of field. Model B stays the better choice if you need the extra reach to 300mm and can accept the slower f/4-7.1 aperture range. Both share the same price and weight, so the decision hinges on aperture versus focal length.