Viltrox announces AF 40mm F2.5 Z, a full-frame autofocus prime lens for Z-mount: Digital Photography Review
| Image: Viltrox |
Viltrox has announced the new AF 40mm F2.5 Z lens for full-frame Nikon Z-mount cameras. The lightweight prime lens provides a normal field of view, roughly approximating the perspective of human vision.
Optically, the AF 40mm F2.5 Z features an internal focus design built around ten elements in six groups. This includes one ED lens, one aspherical lens, three high-refractive index lenses, a high-definition nano-multilayer coating, and a front lens element that includes an anti-fouling coating. The close focus distance is 0.34m (13″).
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| Image: Viltrox |
The lens includes a 52mm filter thread and features a 7-bladed aperture.
The AF 40mm F2.5 Z weighs a relatively lightweight 180g (6.3oz). A stepper motor drives autofocus, and Viltrox says the lens is compatible with face and eye recognition systems. It also says the lens should be suitable for shooting video thanks to low distortion and minimal focus breathing.
On the tech side of things, Viltrox says the lens supports full EXIF transmission to the camera, and it includes a USB interface to support future firmware upgrades.
Viltrox says the AF 40mm F2.5 Z will be available “as soon as April.” It has a suggested retail price of $158.
Sample gallery
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Viltrox AF 40mm F2.5 Z specifications
| Principal specifications | |
|---|---|
| Lens type | Prime lens |
| Max Format size | 35mm FF |
| Focal length | 40 mm |
| Image stabilization | No |
| Lens mount | Nikon Z |
| Aperture | |
| Maximum aperture | F2.5 |
| Minimum aperture | F16 |
| Aperture ring | No |
| Number of diaphragm blades | 7 |
| Optics | |
| Elements | 10 |
| Groups | 6 |
| Special elements / coatings | 1 ED element, 1 aspherical element, 3 high refractive index elements, nano-multilayer coating |
| Focus | |
| Minimum focus | 0.34 m (13.39″) |
| Maximum magnification | 0.14× |
| Autofocus | Yes |
| Motor type | Stepper motor |
| Full time manual | Unknown |
| Focus method | Internal |
| Distance scale | No |
| DoF scale | No |
| Physical | |
| Weight | 180 g (0.40 lb) |
| Diameter | 68 mm (2.68″) |
| Length | 56 mm (2.2″) |
| Materials | Plastic |
| Sealing | No |
| Filter thread | 52 mm |
| Hood supplied | Yes |
| Tripod collar | No |
