The Viltrox AF 40mm f/2.5 FE Air Series is an ultra-light full-frame prime for Sony E-mount with a natural 40mm perspective. Weighing approx. 167 g, with an f/2.5 aperture, fast STM autofocus, Eye/Face AF support and USB-C firmware updates, it is a practical choice for travel, street photography, environmental portraits and everyday video.
The Viltrox AF 40mm f/2.5 FE Air Series is an ultra-light full-frame prime for Sony E-mount with a natural 40mm perspective. Weighing approx. 167 g, with an f/2.5 aperture, fast STM autofocus, Eye/Face AF support and USB-C firmware updates, it is a practical choice for travel, street photography, environmental portraits and everyday video.


The 40mm focal length is natural and versatile: it captures context while still helping the subject stand out. It suits street, travel, portraits and small details.

At approx. 167 g, the lens pairs well with smaller Sony Alpha bodies. The low weight is valuable for travel, longer handheld shooting and vlogging.

The 10-element / 6-group optical design includes ED, HR and aspherical glass. It helps maintain sharpness, contrast and aberration control, while the 7-blade aperture creates soft blur.

The STM motor is fast and quiet, the lens supports Eye/Face AF, and firmware can be updated via USB-C. Reduced focus breathing helps keep framing steady when refocusing.
| Manufacturer: | Viltrox |
| Category: | Lenses |
| Filter thread | 52mm |
| Minimum Focusing Distance | 340mm |
| Number of aperture blades | 7 |
| Lens diameter | 65mm |
| Lens Length | 59.5mm |
| Bayonet | E-mount |
| Lens color | Black |
| Thread | 52mm |
| Lens Type | Fixed Glass |
| Lens suitable for | Full frame |
| Aperture (f) | 2.5 |
| Focal length | 40mm |
| Minimal focal length | 40mm |
| Maximum focal length | 40mm |
| Auto focus | Yes |
| Zoom | No |
| Anamorphic | No |
| Weight | 167g |
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