Conclusion

The Fujifilm GF 63mm f2.8 R WR is a fast and tack-sharp standard "nifty-fifty" lens that exhibits almost no chromatic aberrations, has negligible distortion and is capable of producing some lovely bokeh, whilst being light and compact enough to use as a walk-around lens on the GFX 50S camera. Vignetting at wide-open apertures is the only real optical issue of note, although stopping down to f/8 solves the problem altogether. 

As with Fujifilm's X-series lenses, build quality is excellent, with the metal lens mount and sober all-black design adding to the high-quality feel, and the continuation of the traditional aperture ring being very welcome. Manual focusing is a pleasure, although auto-focusing on the GFX 50S is a little hesitant, thanks to the contrast-based AF system, and also a little noisy in operation.

The GF 63mm f2.8 R WR continues the Fujifilm tradiition of offering a standard lens that is clearly a cut above the norm. This is probably the lens that most new GFX users will start off with, and it's also one that they will probably keep as long as they own the camera.

Ratings (out of 5)
Design	4.5
Features	4.5
Ease-of-use	5
Image quality	5
Value for money	4.5