Tamron 11-20mm F/2.8 Di III-A RXD vs Sigma 18-50mm F2.8 DC DN | Contemporary 021
Side-by-side comparison from our catalogue data. Better values are highlighted only where a clear difference exists.
Verdict at a glance
- Tamron 11-20mm F/2.8 Di III-A RXD goes wider (11mm vs 18mm).
- Sigma 18-50mm F2.8 DC DN | Contemporary 021 reaches further (50mm vs 20mm).
| Spec | 11-20mm F/2.8 Di III-A RXD | 18-50mm F2.8 DC DN | Contemporary 021 |
|---|---|---|
| Brand | Tamron | Sigma |
| Mount | Sony E | Sony E |
| Type | Wide Zoom | Zoom |
| Focal length | 11-20mm (wider) | 18-50mm |
| Max aperture | f/2.8 | f/2.8 |
| Blades | n/a | 7 |
| Format | n/a | aps-c |
| Groups | n/a | 10 |
| Af motor | n/a | Stepping motor |
| Elements | n/a | 13 |
| Weight g | n/a | 290 |
| Filter mm | n/a | 55 |
| Length mm | n/a | 76.5 |
| Diameter mm | n/a | 61.6 |
| Min focus m | n/a | 0.121 |
| Max magnification | n/a | 0.36 |
Tamron 11-20mm F/2.8 Di III-A RXD
An APS-C ultra-wide zoom for Sony E with a constant f/2.8 aperture, giving about 16.5-30mm equivalent. It uses a 67mm filter thread.
Pros
- Constant f/2.8
- Compact
- Takes screw-in filters
Cons
- APS-C only
- No stabilization
Sigma 18-50mm F2.8 DC DN | Contemporary 021
A compact f/2.8 standard zoom for APS-C E-mount cameras, weighing about 290 g. It takes 55mm filters and offers a close focus distance of 0.121 m.
Pros
- Constant f/2.8
- Very light at 290 g
- Close focus 0.121 m
- Stepping motor autofocus
Cons
- APS-C only
- No stabilization in the lens
- Less range than a kit zoom