i did little comparison between 16mm lens on 1 inch from nikon V1 and 35mm fullframe lens on APS-C sensor on Sony NEX5T. both lenses have similar prices on ebay for used models. (less than 80$) both lenses are pretty sharp.
nikon V1: iso 100, @F1.4, 25mm, vintage super16-C mount lens:
sony NEX5T: iso 200, @f1.4, olympus Zukio 50mm,f1.4, vintage fullframe lens:
i did some tests with Nikon V1 and 25mm F1.4 c-mount lens. this lens are pretty damn cheap and best option for nikon’s tiny 1inch sensor. i don’t loss a lots of light, because this lenses made for 16mm camera’s which almost some since then nikon V1 sensors. they really sharp for 30$ lens (used on ebay)
biergarten with playground: