The Viltrox AF 16mm F1.8 Full-frame with Sony E-mount – photographic lens is a full-frame wide-angle lens designed for Sony E mount cameras, ideal for landscapes, astrophotography and video. With an optical structure consisting of 15 elements in 12 groups, including three aspherical and four low dispersion (ED) elements, it delivers sharp, high-contrast images while reducing chromatic aberrations and distortions.
The maximum aperture of f/1.8 allows more light to be captured, which is useful in low-light conditions. Sharpness is excellent in the center already at full aperture, improving further at f/5.6. Vignetting is present at f/1.8 but decreases with more closed apertures.
Autofocus, operated by a stepping motor (STM), is fast and quiet, compatible with the face and eye detection systems of Sony cameras. The lens has a jerkless aperture ring, useful for video shooting. The metal construction is dustproof, with a bayonet lens hood included. It also has a USB-C port for firmware updates.

In summary, the Viltrox AF 16mm f/1.8 FE offers high optical performance at a competitive price, making it an excellent choice for those looking for a versatile wide-angle lens for Sony cameras.