Viltrox's compact APS-C normal prime — 37.5mm equiv at f/1.7 with fast AF for Fujifilm X-mount.
The Viltrox AF 25mm f/1.7 is an autofocus APS-C prime for Fujifilm X-mount, providing a 37.5mm full-frame equivalent perspective. STM (stepping motor) autofocus. Twelve elements in 10 groups. Nine aperture blades. 52mm filter thread. At approximately 170g. 0.30m MFD.
The optical design uses 12 elements in 10 groups. Nine aperture blades. The 52mm filter thread is compact. At approximately 170g the lens is lightweight. Minimum focus distance of 0.30m. STM autofocus with internal focusing — quiet, suited to video. f/1.7 maximum aperture. APS-C image circle (37.5mm equivalent).
The 37.5mm equivalent at f/1.7 provides near-normal field of view with shallow depth of field for APS-C bodies — a practical street and environmental portrait prime at a budget price point. The STM motor's quiet operation makes the AF 25mm f/1.7 suitable for video use on Fujifilm X bodies where audible AF motor noise would be captured by on-camera microphone.
On the used market the Viltrox AF 25mm f/1.7 is very affordable as a compact Fujifilm X prime. Condition checks: STM AF response, 52mm front element for marks, aperture ring (electronic only). APS-C only. Compatible with all Fujifilm X-mount APS-C bodies.