Sony FE 40mm F2.5 G vs Viltrox AF 40mm F2.5 Air
Every published spec side by side, with today's lowest prices for the market you've chosen.
Key differences
- Closest focus: 0.25 m on the FE 40mm F2.5 G, against 0.34 m on the AF 40mm F2.5 Air.
- Max magnification: 0.23× on the FE 40mm F2.5 G, against 0.14× on the AF 40mm F2.5 Air.
- Weather sealed: Yes on the FE 40mm F2.5 G, against No on the AF 40mm F2.5 Air.
- Aperture ring: Yes on the FE 40mm F2.5 G, against No on the AF 40mm F2.5 Air.
- Weight: 173 g on the FE 40mm F2.5 G, against 180 g on the AF 40mm F2.5 Air.
FE 40mm F2.5 G or AF 40mm F2.5 Air: which should you buy?
Choose the FE 40mm F2.5 G for its closest focus, max magnification, weather sealed and aperture ring. It leads on 5 specs in all.
On published specs the AF 40mm F2.5 Air leads the FE 40mm F2.5 G nowhere; buy it for its price, its handling or the lenses you already own.
On paper the FE 40mm F2.5 G wins more rows (5 to 0); if the AF 40mm F2.5 Air's strengths are the ones you shoot with, and its price is lower where you buy, it can still be the better buy.
 |  | |
|---|---|---|
| Lowest price today | $686 new $529 used | $168 new |
| Optics | ||
| Focal length | 40mm | 40mm |
| 35mm equivalent | 40mm (full frame) | 40mm (full frame) |
| Maximum apertureLower f-number lets in more light. A zoom wins only when it is as bright at both ends. | f/2.5 | f/2.5 |
| Minimum aperture | f/22 | f/16 |
| Made for | Full frame | Full frame |
| Elements / groups | 9 / 9 | 10 / 6 |
| Aperture blades | 7 | 7 |
| Closest focus | 0.25 m (best) | 0.34 m |
| Max magnification | 0.23× (best) | 0.14× |
| Focus & handling | ||
| Autofocus | Yes (Linear) | Yes (STM) |
| Optical stabilisation | No | No |
| Weather sealed | Yes (best) | No |
| Internal zoom | — | — |
| Aperture ring | Yes (best) | No |
| Teleconverter compatible | No | No |
| Size & weight | ||
| Weight | 173 g (best) | 180 g |
| Diameter × length | 68 × 45 mm | 68 × 55.9 mm |
| Filter thread | 49 mm | 52 mm |
Green marks the better figure where “better” is unambiguous. A dash means the maker doesn't publish it or we haven't verified it yet.