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″).

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

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