Tamron 70-300mm F/4.5-6.3 Di III RXD vs Sigma 28-70mm F2.8 DG 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
- Sigma 28-70mm F2.8 DG DN | Contemporary 021 is faster by 1.4 stops (f/2.8 vs f/4.5), letting in more light.
- Sigma 28-70mm F2.8 DG DN | Contemporary 021 is lighter by 75g.
- Sigma 28-70mm F2.8 DG DN | Contemporary 021 goes wider (28mm vs 70mm).
- Tamron 70-300mm F/4.5-6.3 Di III RXD reaches further (300mm vs 70mm).
| Spec | 70-300mm F/4.5-6.3 Di III RXD | 28-70mm F2.8 DG DN | Contemporary 021 |
|---|---|---|
| Brand | Tamron | Sigma |
| Mount | Sony E | Sony E |
| Type | Telephoto Zoom | Zoom |
| Focal length | 70-300mm | 28-70mm (wider) |
| Max aperture | f/4.5 | f/2.8 (faster) |
| Format | full-frame | full-frame |
| Af motor | RXD | Stepping motor |
| Weight g | 545 | 470 (lighter) |
| Filter mm | 67 | 67 |
| Length mm | 148.0 | n/a |
| Diameter mm | 77.0 | n/a |
| Min focus m | 0.8 | 0.19 (closer focusing) |
| Blades | n/a | 9 |
| Groups | n/a | 12 |
| Elements | n/a | 16 |
| Max magnification | n/a | 0.3 |
Tamron 70-300mm F/4.5-6.3 Di III RXD
Compact telephoto zoom for Sony full-frame covering 70-300mm. It has no stabilization and weighs about 545 g.
Pros
- Light at about 545 g
- Compact
- RXD focus motor
Cons
- No lens stabilization
- Slow aperture
Sigma 28-70mm F2.8 DG DN | Contemporary 021
Compact f/2.8 standard zoom for full-frame mirrorless from Sigma's Contemporary line. It weighs about 470 g and starts at 28mm.
Pros
- Constant f/2.8 in a small body
- Light at about 470 g
- Close focus to 0.19 m
Cons
- Starts at 28mm
- No stabilization