the extremely affordable Nikon Nikkor AF-S DX 35mm f/1.8 G. Again, you need an FTZ adapter in this case, and this lens is not as sharp or as bright as our recommendation from Sigma, but the price ...

Distortion measures at -1.32% barrel, a good result for a 35mm lens. Further correction can be undertaken in software if required, although this is unlikely to be needed in most images.