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: