Fujifilm's ultra-fast portrait prime — the world's fastest AF lens at f/1.0 for X-mount.
The Fujifilm XF 50mm f/1.0 R WR was released in September 2020 as the fastest autofocus prime in the Fujifilm XF lens lineup — the first f/1.0 AF lens available for any APS-C mirrorless system at launch. On Fujifilm X APS-C, 50mm provides approximately 76mm equivalent. Weather-resistant construction. Fujifilm X mount.
f/1.0 maximum aperture. 50mm focal length (approximately 76mm equivalent on APS-C). Approximately twelve elements in ten groups. 77mm filter thread. At approximately 845g. WR (weather-resistant). R (aperture ring). No OIS — relies on body IBIS. Fujifilm X mount.
The f/1.0 aperture provides extreme subject separation and very high light gathering at the cost of a very narrow depth of field that demands precise focus — eye-detection AF on compatible X bodies is particularly valuable at f/1.0. The 845g weight is substantial for an APS-C prime, reflecting the optical complexity of an f/1.0 design. No OIS is built into the lens; bodies with IBIS (X-H2S, X-H2, X-T5) provide stabilisation.
On the used market the Fujifilm XF 50mm f/1.0 R WR is a premium ultra-fast prime for Fujifilm X cameras. Condition checks: AF accuracy at f/1.0 (test with eye detection on compatible body), 77mm front element for marks, weather sealing integrity, 845g weight balance with target body. No OIS — confirm body provides IBIS for handheld use.