TTArtisan Introduces AF 40mm f/2 Lens
Chinese company TTArtisan has introduced the AF 40mm f/2, a compact full-frame prime lens designed for Sony E and Nikon Z mounts, with a Leica L-mount version expected to follow. The lens is positioned as an inexpensive option while still offering features such autofocus, an all-metal build and a clicking aperture ring.
Physically, the AF 40mm f/2 measures 61 mm in diameter and 44 mm in length, weighing between 167 and 176 grams depending on the mount, and its body is made from aviation-grade aluminum that contributes to both durability and low weight. It supports 52 mm filters and is supplied with a petal-shaped metal hood. Firmware updates are carried out through a USB-C port located on the rear lens cap.
The lens is constructed from nine elements arranged in six groups, including one extra-low dispersion element, one high refractive index element and one aspherical element. It features a seven-blade diaphragm and a maximum aperture of f/2, narrowing to f/16. Focusing is handled by a stepping motor, with a minimum focusing distance of 0.4 meters, enabling a maximum magnification of 0.13x.
In terms of image quality, wide-open performance shows good sharpness and contrast in the center of the frame, but corner performance remains soft until stopped down. Strong vignetting is visible at f/2, decreasing but not disappearing entirely when the aperture is narrowed. Close-up image quality is also weak at maximum aperture, with reduced contrast that improves only at f/4. When shooting against strong light sources, glare and flare are pronounced at wider apertures, though these improve slightly when stopped down. Coma is noticeable in the corners at f/2, a drawback for astrophotography, but diminishes when used at f/4. The lens produces smooth background blur, although transitions can appear slightly harsh in some situations.
Here are some sample pictures, courtesy of TTArtisan:
The TTArtisan AF 40mm f/2 is available now for $168 in Sony E and Nikon Z mounts.
