Fujifilm XF 23mm f/1.4 R
Get Fujifilm X-Pro2 and Fujifilm XF 23mm f/1.4 and Fujifilm XF lens B&H Photo.
Note: the XF 56mm f/1.2 APD has gorgeous rendering and it is $400 off thru Apr 2. Or, see all Fujifilm X lenses with rebates.
A 24-megapixel APS-C sensor is extremely demanding of lens performance, being equivalent to a 56-megapixel sensor in full frame terms (pixel density).
Fujifilm XF 23mm f/1.4 Aperture Series: Ranch Barn, Oblique View (X-Pro2)
Images at sizes up to 24 megapixels (full-res) along one large crop, all from f/1.4 through f/9.
This series shows just how much stopping down is necessary for peak sharpness.
See also the similar scene with the XF 35mm f/2.
Ranch Barn, Carrizo Plain
f6.4 @ 1/300 sec, ISO 200; 2016-03-21 17:16:36[low-res image for bot]
X-Pro2 + XF23mmF1.4 R @ 35.1mm equiv (23mm)