Another source for C-mount adaptors to let you use SLR lenses on your
Panasonic WV-1410 camera is Brooklyn Camera Exchange – (718) 462-2892. I
use my Nikon 50mm lens with one of their adaptors (and an extension tube)
to digitize from 35mm. color negatives.
Incidentally, most older 16mm film cameras use C-mount lenses, so good used
ones are sometimes available at reasonable prices, e.g., I saw an Angenieux
Vario-Switar 18-86mm F:2.5 in very nice shape going for $149 recently.