Sony FE 100mm f/2.8 STF GM OSS vs Sony FE 70-200mm f/4 G OSS
The bottom line
The Sony FE 70-200mm f/4 G OSS is a zoom (70-200mm) and the Sony FE 100mm f/2.8 STF GM OSS is a 100mm prime. The zoom gives you framing flexibility from one lens; the prime trades that for a fixed focal length that's usually brighter (f/2.8 vs f/4) and lighter to carry. Choose flexibility or a fast single focal length.
Choose the Sony FE 100mm f/2.8 STF GM OSS if…
- ✓You want more light and background blur — f/2.8 is faster than f/4, better for low light and subject separation.
- ✓You prefer a fast, compact single focal length — a 100mm prime over a zoom.
Choose the Sony FE 70-200mm f/4 G OSS if…
- ✓You need more reach — it goes to 200mm vs 100mm for distant subjects, wildlife and sport.
- ✓You shoot wide — it starts at 70mm vs 100mm for landscapes, interiors and architecture.
- ✓You want one-lens flexibility — a 70-200mm zoom covers what the fixed 100mm 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 100mm f/2.8 STF GM OSS opens to f/2.8 vs the Sony FE 70-200mm f/4 G OSS's f/4 — more light and shallower depth-of-field.
- ›Focal range: Sony FE 100mm f/2.8 STF GM OSS is 100mm, Sony FE 70-200mm f/4 G OSS is 70-200mm — different framing and reach.
- ›Type: the Sony FE 70-200mm f/4 G OSS is a zoom (flexible framing), the Sony FE 100mm f/2.8 STF GM OSS a prime (one focal length, usually brighter and lighter).
- ›Weight: the Sony FE 100mm f/2.8 STF GM OSS is 700g (1.54 lb) vs 840g (1.85 lb) — you'll feel the difference handheld.
- ›Durability: the Sony FE 70-200mm f/4 G OSS is weather-sealed; the other isn't.
Frequently asked
Is the Sony FE 100mm f/2.8 STF GM OSS or the Sony FE 70-200mm f/4 G OSS better?
The Sony FE 70-200mm f/4 G OSS is a zoom (70-200mm) and the Sony FE 100mm f/2.8 STF GM OSS is a 100mm prime. The zoom gives you framing flexibility from one lens; the prime trades that for a fixed focal length that's usually brighter (f/2.8 vs f/4) and lighter to carry. Choose flexibility or a fast single focal length.
Who should choose the Sony FE 100mm f/2.8 STF GM OSS?
Choose the Sony FE 100mm f/2.8 STF GM OSS 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 prefer a fast, compact single focal length — a 100mm prime over a zoom.
Who should choose the Sony FE 70-200mm f/4 G OSS?
Choose the Sony FE 70-200mm f/4 G OSS if you need more reach — it goes to 200mm vs 100mm for distant subjects, wildlife and sport. Choose it if you shoot wide — it starts at 70mm vs 100mm for landscapes, interiors and architecture. Choose it if you want one-lens flexibility — a 70-200mm zoom covers what the fixed 100mm 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 100mm f/2.8 STF GM OSS and the Sony FE 70-200mm f/4 G OSS?
Aperture: the Sony FE 100mm f/2.8 STF GM OSS opens to f/2.8 vs the Sony FE 70-200mm f/4 G OSS's f/4 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 100mm | 70-200mm |
| Lens Type | Prime | Zoom |
| Optical Elements | 15 | 21 |
| Optical Groups | 12 | 15 |
| Aperture & Iris | ||
| Maximum Aperture | f/2.8 | f/4 |
| Minimum Aperture | f/16 | f/22 |
| Aperture Blades | 11 | 9 |
| Rounded Aperture | No | Yes |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | Full-Frame |
| Lens Mount | Sony E | Sony E |
| Angle of View | 24° | 34° – 12° |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | DDSSM | DDSSM |
| Focus Limiter | No | No |
| AF/MF Switch | No | Yes |
| Min Focus Distance | 85 cm | 110 cm |
| Max Magnification | 0.14x | 0.13x |
| Stabilization & Video | ||
| Optical Stabilization | Yes | Yes |
| Aperture Ring | No | No |
| Declickable Aperture | No | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $1,498 | $1,499 |
| Filter Size | 72mm | 72mm |
| Diameter | 80.5mm | 80mm |
| Length | 118.5mm | 175mm |
| Weight | 700g (1.54 lb) | 840g (1.85 lb) |
| Weather Sealed | No | Yes |
| Tripod Collar | No | Yes |
