Nikon 35mm f1.8G FX - Travel star
I decided on this lens as part of a lightweight travel combo with the Df over the 35mm Sigma (couldn't get a copy that didn't front focus with the Df, may try again in a few months - its sharpness at f1.4 is addictive) and Nikon f1.4G (shot with it a year ago on a D800E, lovely rendering), primarily due to weight and the general performance.
I can't recommend this lens highly enough. I take it around most of the time just with the Df. Its so light you hardly notice (feels lighter then the M240 and 35mm f1.4 I tried before).
I love the draw, but its sharp from f1.8G which is quite an achievement at this weight.
Anyway, strictly amateur, but some real world pictures using the lens: