Sony FE 20-70mm f/4 G vs Tamron 25-200mm f/2.8-5.6 Di III VXD G2
The bottom line
Similar coverage, different speed: the Tamron 25-200mm f/2.8-5.6 Di III VXD G2 opens to f/2.8 versus the Sony FE 20-70mm f/4 G's f/4 — more light and shallower background blur. The Sony FE 20-70mm f/4 G gives that up to stay lighter (488g (1.08 lb)). It comes down to how much you value that extra brightness.
Choose the Tamron 25-200mm f/2.8-5.6 Di III VXD G2 if…
- ✓You want more light and background blur — f/2.8 is faster than f/4, better for low light and subject separation.
- ✓You need more reach — it goes to 200mm vs 70mm for distant subjects, wildlife and sport.
Where they differ
- ›Aperture: the Tamron 25-200mm f/2.8-5.6 Di III VXD G2 opens to f/2.8 vs the Sony FE 20-70mm f/4 G's f/4 — more light and shallower depth-of-field.
- ›Focal range: Sony FE 20-70mm f/4 G is 20-70mm, Tamron 25-200mm f/2.8-5.6 Di III VXD G2 is 25-200mm — different framing and reach.
- ›Price: the Tamron 25-200mm f/2.8-5.6 Di III VXD G2 is $999, $100 under the Sony FE 20-70mm f/4 G.
- ›Weight: the Sony FE 20-70mm f/4 G is 488g (1.08 lb) vs 575g (1.27 lb) — you'll feel the difference handheld.
Frequently asked
Is the Sony FE 20-70mm f/4 G or the Tamron 25-200mm f/2.8-5.6 Di III VXD G2 better?
Similar coverage, different speed: the Tamron 25-200mm f/2.8-5.6 Di III VXD G2 opens to f/2.8 versus the Sony FE 20-70mm f/4 G's f/4 — more light and shallower background blur. The Sony FE 20-70mm f/4 G gives that up to stay lighter (488g (1.08 lb)). It comes down to how much you value that extra brightness.
Who should choose the Tamron 25-200mm f/2.8-5.6 Di III VXD G2?
Choose the Tamron 25-200mm f/2.8-5.6 Di III VXD G2 if you want more light and background blur — f/2.8 is faster than f/4, better for low light and subject separation. Choose it if you need more reach — it goes to 200mm vs 70mm for distant subjects, wildlife and sport.
What is the main difference between the Sony FE 20-70mm f/4 G and the Tamron 25-200mm f/2.8-5.6 Di III VXD G2?
Aperture: the Tamron 25-200mm f/2.8-5.6 Di III VXD G2 opens to f/2.8 vs the Sony FE 20-70mm f/4 G's f/4 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 20-70mm | 25-200mm |
| Lens Type | Zoom | Zoom |
| Optical Elements | 16 | 18 |
| Optical Groups | 13 | 14 |
| Aperture & Iris | ||
| Maximum Aperture | f/4 | f/2.8 |
| Minimum Aperture | f/22 | f/32 |
| Aperture Blades | 9 | 9 |
| Rounded Aperture | Yes | Yes |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | Full-Frame |
| Lens Mount | Sony E | Sony E |
| Angle of View | 94° – 34° | 82° – 12° |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | XD Linear | VXD |
| Focus Limiter | No | No |
| AF/MF Switch | Yes | Yes |
| Min Focus Distance | 25 cm | 17 cm |
| Max Magnification | 0.39x | 0.4x |
| Stabilization & Video | ||
| Optical Stabilization | No | No |
| Aperture Ring | Yes | No |
| Declickable Aperture | Yes | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $1,099 | $999 |
| Filter Size | 72mm | 67mm |
| Diameter | 78.7mm | 76.6mm |
| Length | 99mm | 118.6mm |
| Weight | 488g (1.08 lb) | 575g (1.27 lb) |
| Weather Sealed | Yes | Yes |
| Tripod Collar | No | No |
