The 23mm f/1.4 is part of TTArtisan's original wave of fast manual APS-C primes, sitting between the wider 17mm and the more common 35mm in the company's early lens lineup. It answered demand for a bright, native-equivalent wide-normal lens on Fujifilm, Sony and other APS-C mirrorless systems.
It uses 8 elements in 6 groups, focuses manually to 0.2m, and takes 43mm filters. Weight runs approximately 222-250g depending on mount, and a 10-blade aperture stops down to f/16, giving a rounder out-of-focus rendering than the company's earlier lenses. Angle of view is roughly 62 degrees on APS-C.
At 23mm the lens gives a 35mm-equivalent field of view, a documentary and street-photography standard, and its f/1.4 aperture allows shallow depth of field and low-light work that many kit zooms cannot match. Wide-open softness and coma in corners are typical trade-offs of the price bracket.
TTArtisan sold this lens in Sony E, Fujifilm X, Nikon Z, Canon RF, L-mount and Micro Four Thirds fittings, with the Canon RF and EF-M variants now listed as discontinued. Used buyers should check focus ring smoothness and inspect for the front-element coating blemishes occasionally reported on early units.