Sony E PZ 18-105mm f/4 G OSS vs Sony FE 40mm f/2.5 G
The bottom line
The Sony E PZ 18-105mm f/4 G OSS is a zoom (18-105mm) and the Sony FE 40mm f/2.5 G is a 40mm prime. The zoom gives you framing flexibility from one lens; the prime trades that for a fixed focal length that's usually brighter (f/2.5 vs f/4) and lighter to carry. Choose flexibility or a fast single focal length.
Choose the Sony E PZ 18-105mm f/4 G OSS if…
- ✓You need more reach — it goes to 105mm vs 40mm for distant subjects, wildlife and sport.
- ✓You shoot wide — it starts at 18mm vs 40mm for landscapes, interiors and architecture.
- ✓You want one-lens flexibility — a 18-105mm zoom covers what the fixed 40mm can't reframe.
- ✓You shoot handheld or on an unstabilised body — it has optical stabilisation, the other doesn't.
Choose the Sony FE 40mm f/2.5 G if…
- ✓You want more light and background blur — f/2.5 is faster than f/4, better for low light and subject separation.
- ✓You prefer a fast, compact single focal length — a 40mm prime over a zoom.
- ✓You value portability — at 173g (6.1 oz) it's lighter than the 427g (15.1 oz) alternative for travel and all-day carry.
- ✓You work outdoors — it's weather-sealed against dust and moisture; the other isn't.
Where they differ
- ›Aperture: the Sony FE 40mm f/2.5 G opens to f/2.5 vs the Sony E PZ 18-105mm f/4 G OSS's f/4 — more light and shallower depth-of-field.
- ›Focal range: Sony E PZ 18-105mm f/4 G OSS is 18-105mm, Sony FE 40mm f/2.5 G is 40mm — different framing and reach.
- ›Type: the Sony E PZ 18-105mm f/4 G OSS is a zoom (flexible framing), the Sony FE 40mm f/2.5 G a prime (one focal length, usually brighter and lighter).
- ›Stabilisation: only the Sony E PZ 18-105mm f/4 G OSS has optical stabilisation — steadier handheld shots, especially on bodies without IBIS.
- ›Weight: the Sony FE 40mm f/2.5 G is 173g (6.1 oz) vs 427g (15.1 oz) — you'll feel the difference handheld.
- ›Durability: the Sony FE 40mm f/2.5 G is weather-sealed; the other isn't.
Frequently asked
Is the Sony E PZ 18-105mm f/4 G OSS or the Sony FE 40mm f/2.5 G better?
The Sony E PZ 18-105mm f/4 G OSS is a zoom (18-105mm) and the Sony FE 40mm f/2.5 G is a 40mm prime. The zoom gives you framing flexibility from one lens; the prime trades that for a fixed focal length that's usually brighter (f/2.5 vs f/4) and lighter to carry. Choose flexibility or a fast single focal length.
Who should choose the Sony E PZ 18-105mm f/4 G OSS?
Choose the Sony E PZ 18-105mm f/4 G OSS if you need more reach — it goes to 105mm vs 40mm for distant subjects, wildlife and sport. Choose it if you shoot wide — it starts at 18mm vs 40mm for landscapes, interiors and architecture. Choose it if you want one-lens flexibility — a 18-105mm zoom covers what the fixed 40mm can't reframe. Choose it if you shoot handheld or on an unstabilised body — it has optical stabilisation, the other doesn't.
Who should choose the Sony FE 40mm f/2.5 G?
Choose the Sony FE 40mm f/2.5 G if you want more light and background blur — f/2.5 is faster than f/4, better for low light and subject separation. Choose it if you prefer a fast, compact single focal length — a 40mm prime over a zoom. Choose it if you value portability — at 173g (6.1 oz) it's lighter than the 427g (15.1 oz) alternative for travel and all-day carry. 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 E PZ 18-105mm f/4 G OSS and the Sony FE 40mm f/2.5 G?
Aperture: the Sony FE 40mm f/2.5 G opens to f/2.5 vs the Sony E PZ 18-105mm f/4 G OSS's f/4 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 18-105mm | 40mm |
| Lens Type | Zoom | Prime |
| Optical Elements | 17 | 8 |
| Optical Groups | 12 | 7 |
| Aperture & Iris | ||
| Maximum Aperture | f/4 | f/2.5 |
| Minimum Aperture | f/22 | f/22 |
| Aperture Blades | 7 | 9 |
| Rounded Aperture | Yes | Yes |
| Coverage & Angle | ||
| Format Coverage | APS-C | Full-Frame |
| Lens Mount | Sony E | Sony E |
| Angle of View | 76° – 15° | 57° |
| 35mm Equivalent | 27-158mm | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | Stepping | XD Linear |
| Focus Limiter | No | No |
| AF/MF Switch | No | Yes |
| Min Focus Distance | 45 cm | 25 cm |
| Max Magnification | 0.25x | 0.23x |
| Stabilization & Video | ||
| Optical Stabilization | Yes | No |
| Aperture Ring | No | Yes |
| Declickable Aperture | No | Yes |
| Parfocal | No | No |
| Internal Zoom | Yes | No |
| General | ||
| Price (MSRP) | $599 | $599 |
| Filter Size | 72mm | 49mm |
| Diameter | 78mm | 68mm |
| Length | 110mm | 45.5mm |
| Weight | 427g (15.1 oz) | 173g (6.1 oz) |
| Weather Sealed | No | Yes |
| Tripod Collar | No | No |
