Sony FE 55mm f/1.8 ZA vs Tamron 35-100mm F/2.8 Di III VXD
The bottom line
The Tamron 35-100mm F/2.8 Di III VXD is a zoom (35-100mm) and the Sony FE 55mm f/1.8 ZA 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/2.8) and lighter to carry. Choose flexibility or a fast single focal length.
Choose the Sony FE 55mm f/1.8 ZA if…
- ✓You want more light and background blur — f/1.8 is faster than f/2.8, better for low light and subject separation.
- ✓You prefer a fast, compact single focal length — a 55mm prime over a zoom.
- ✓You value portability — at 281g (9.9 oz) it's lighter than the 565g (1.25 lb) alternative for travel and all-day carry.
Choose the Tamron 35-100mm F/2.8 Di III VXD if…
- ✓You need more reach — it goes to 100mm vs 55mm for distant subjects, wildlife and sport.
- ✓You shoot wide — it starts at 35mm vs 55mm for landscapes, interiors and architecture.
- ✓You want one-lens flexibility — a 35-100mm zoom covers what the fixed 55mm can't reframe.
- ✓You work outdoors — it's weather-sealed against dust and moisture; the other isn't.
Where they differ
- ›Aperture: the Sony FE 55mm f/1.8 ZA opens to f/1.8 vs the Tamron 35-100mm F/2.8 Di III VXD's f/2.8 — more light and shallower depth-of-field.
- ›Focal range: Sony FE 55mm f/1.8 ZA is 55mm, Tamron 35-100mm F/2.8 Di III VXD is 35-100mm — different framing and reach.
- ›Type: the Tamron 35-100mm F/2.8 Di III VXD is a zoom (flexible framing), the Sony FE 55mm f/1.8 ZA a prime (one focal length, usually brighter and lighter).
- ›Weight: the Sony FE 55mm f/1.8 ZA is 281g (9.9 oz) vs 565g (1.25 lb) — you'll feel the difference handheld.
- ›Durability: the Tamron 35-100mm F/2.8 Di III VXD is weather-sealed; the other isn't.
Frequently asked
Is the Sony FE 55mm f/1.8 ZA or the Tamron 35-100mm F/2.8 Di III VXD better?
The Tamron 35-100mm F/2.8 Di III VXD is a zoom (35-100mm) and the Sony FE 55mm f/1.8 ZA 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/2.8) and lighter to carry. Choose flexibility or a fast single focal length.
Who should choose the Sony FE 55mm f/1.8 ZA?
Choose the Sony FE 55mm f/1.8 ZA if you want more light and background blur — f/1.8 is faster than f/2.8, 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 value portability — at 281g (9.9 oz) it's lighter than the 565g (1.25 lb) alternative for travel and all-day carry.
Who should choose the Tamron 35-100mm F/2.8 Di III VXD?
Choose the Tamron 35-100mm F/2.8 Di III VXD if you need more reach — it goes to 100mm vs 55mm for distant subjects, wildlife and sport. Choose it if you shoot wide — it starts at 35mm vs 55mm for landscapes, interiors and architecture. Choose it if you want one-lens flexibility — a 35-100mm zoom covers what the fixed 55mm can't reframe. 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 55mm f/1.8 ZA and the Tamron 35-100mm F/2.8 Di III VXD?
Aperture: the Sony FE 55mm f/1.8 ZA opens to f/1.8 vs the Tamron 35-100mm F/2.8 Di III VXD's f/2.8 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 55mm | 35-100mm |
| Lens Type | Prime | Zoom |
| Optical Elements | 7 | 15 |
| Optical Groups | 6 | 13 |
| Aperture & Iris | ||
| Maximum Aperture | f/1.8 | f/2.8 |
| Minimum Aperture | f/22 | f/22 |
| 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 | 43° | 63.4° – 24.4° |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | DDL | VXD |
| Focus Limiter | No | No |
| AF/MF Switch | No | No |
| Min Focus Distance | 50 cm | 22 cm |
| Max Magnification | 0.14x | − |
| Stabilization & Video | ||
| Optical Stabilization | No | No |
| Aperture Ring | No | No |
| Declickable Aperture | No | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $998 | $899 |
| Filter Size | 49mm | 67mm |
| Diameter | 64.4mm | 80.6mm |
| Length | 70.5mm | 119.2mm |
| Weight | 281g (9.9 oz) | 565g (1.25 lb) |
| Weather Sealed | No | Yes |
| Tripod Collar | No | No |
