Viltrox's budget portrait prime for APS-C mirrorless — 84mm equivalent at f/1.7 with fast AF.
The Viltrox AF 56mm f/1.7 is an autofocus APS-C prime for Fujifilm X-mount, released in April 2024, providing an 85.6mm full-frame equivalent perspective at f/1.7. At 171g and 52mm filter thread it is lightweight for a fast portrait focal length. STM autofocus motor provides quiet, smooth AF suited to video recording. The optical formula uses 4 ED elements and 3 high-refractive-index elements to control aberration at f/1.7.
The optical design uses 11 elements in 9 groups including 4 ED and 3 high-refractive-index elements. Nine rounded aperture blades produce smooth bokeh. The 52mm filter thread is compact. At 171g the lens is lightweight. Minimum focus distance of 0.55m. STM autofocus motor with by-wire manual focus. f/1.7 maximum aperture. APS-C image circle.
The 85.6mm equivalent at f/1.7 positions the Viltrox 56mm as a portrait prime for Fujifilm X bodies at an accessible price point. At f/1.7, subject-background separation and low-light capability exceed the Fujifilm XF 56mm f/1.2 APD in light transmission — one third-stop faster. At 171g the lens adds minimal weight to any Fujifilm X body. The ED elements target the lateral chromatic aberration that is the primary aberration challenge at f/1.7 portrait focal lengths.
On the used market the Viltrox AF 56mm f/1.7 is a 2024 product with limited used availability. Condition checks: STM AF motor response, 52mm front element for marks, and aperture ring operation. Compatible with all Fujifilm X-mount APS-C bodies.