Sony FE 28-70mm f/3.5-5.6 OSS vs Viltrox AF 55mm f/1.8 EVO
The bottom line
The Sony FE 28-70mm f/3.5-5.6 OSS is a zoom (28-70mm) and the Viltrox AF 55mm f/1.8 EVO is a 55mm prime. The zoom gives you framing flexibility from one lens; the prime trades that for a fixed focal length that's usually brighter (f/1.8 vs f/3.5) and lighter to carry. Choose flexibility or a fast single focal length.
Choose the Sony FE 28-70mm f/3.5-5.6 OSS if…
- ✓You shoot wide — it starts at 28mm vs 55mm for landscapes, interiors and architecture.
- ✓You want one-lens flexibility — a 28-70mm zoom covers what the fixed 55mm can't reframe.
- ✓You shoot handheld or on an unstabilised body — it has optical stabilisation, the other doesn't.
- ✓You value portability — at 295g (10.4 oz) it's lighter than the 370g (13.1 oz) alternative for travel and all-day carry.
Choose the Viltrox AF 55mm f/1.8 EVO if…
- ✓You want more light and background blur — f/1.8 is faster than f/3.5, better for low light and subject separation.
- ✓You prefer a fast, compact single focal length — a 55mm prime over a zoom.
- ✓You work outdoors — it's weather-sealed against dust and moisture; the other isn't.
Where they differ
- ›Aperture: the Viltrox AF 55mm f/1.8 EVO opens to f/1.8 vs the Sony FE 28-70mm f/3.5-5.6 OSS's f/3.5 — more light and shallower depth-of-field.
- ›Focal range: Sony FE 28-70mm f/3.5-5.6 OSS is 28-70mm, Viltrox AF 55mm f/1.8 EVO is 55mm — different framing and reach.
- ›Type: the Sony FE 28-70mm f/3.5-5.6 OSS is a zoom (flexible framing), the Viltrox AF 55mm f/1.8 EVO a prime (one focal length, usually brighter and lighter).
- ›Stabilisation: only the Sony FE 28-70mm f/3.5-5.6 OSS has optical stabilisation — steadier handheld shots, especially on bodies without IBIS.
- ›Durability: the Viltrox AF 55mm f/1.8 EVO is weather-sealed; the other isn't.
Frequently asked
Is the Sony FE 28-70mm f/3.5-5.6 OSS or the Viltrox AF 55mm f/1.8 EVO better?
The Sony FE 28-70mm f/3.5-5.6 OSS is a zoom (28-70mm) and the Viltrox AF 55mm f/1.8 EVO is a 55mm prime. The zoom gives you framing flexibility from one lens; the prime trades that for a fixed focal length that's usually brighter (f/1.8 vs f/3.5) and lighter to carry. Choose flexibility or a fast single focal length.
Who should choose the Sony FE 28-70mm f/3.5-5.6 OSS?
Choose the Sony FE 28-70mm f/3.5-5.6 OSS if you shoot wide — it starts at 28mm vs 55mm for landscapes, interiors and architecture. Choose it if you want one-lens flexibility — a 28-70mm zoom covers what the fixed 55mm can't reframe. Choose it if you shoot handheld or on an unstabilised body — it has optical stabilisation, the other doesn't. Choose it if you value portability — at 295g (10.4 oz) it's lighter than the 370g (13.1 oz) alternative for travel and all-day carry.
Who should choose the Viltrox AF 55mm f/1.8 EVO?
Choose the Viltrox AF 55mm f/1.8 EVO if you want more light and background blur — f/1.8 is faster than f/3.5, better for low light and subject separation. Choose it if you prefer a fast, compact single focal length — a 55mm prime over a zoom. Choose it if you work outdoors — it's weather-sealed against dust and moisture; the other isn't.
What is the main difference between the Sony FE 28-70mm f/3.5-5.6 OSS and the Viltrox AF 55mm f/1.8 EVO?
Aperture: the Viltrox AF 55mm f/1.8 EVO opens to f/1.8 vs the Sony FE 28-70mm f/3.5-5.6 OSS's f/3.5 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 28-70mm | 55mm |
| Lens Type | Zoom | Prime |
| Optical Elements | 9 | 13 |
| Optical Groups | 7 | 9 |
| Aperture & Iris | ||
| Maximum Aperture | f/3.5 | f/1.8 |
| Minimum Aperture | f/22 | f/16 |
| Aperture Blades | 7 | 9 |
| Rounded Aperture | No | Yes |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | Full-Frame |
| Lens Mount | Sony E | Sony E |
| Angle of View | 75° – 34° | 43° |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | Stepping | STM |
| Focus Limiter | No | No |
| AF/MF Switch | No | Yes |
| Min Focus Distance | 30 cm | 43 cm |
| Max Magnification | 0.19x | − |
| Stabilization & Video | ||
| Optical Stabilization | Yes | No |
| Aperture Ring | No | No |
| Declickable Aperture | No | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $299 | $370 |
| Filter Size | 55mm | 58mm |
| Diameter | 72.5mm | − |
| Length | 83mm | 76mm |
| Weight | 295g (10.4 oz) | 370g (13.1 oz) |
| Weather Sealed | No | Yes |
| Tripod Collar | No | No |
