I bought a Sony camcorder years ago with a night vision setting on it. I'm sure some of you can recall the issue with it. When you used the night vision during the day you could see through light clothing. I'm sure this lens must work better, but you could really see some stunning visions.
Lets just say that I had one spectacular Summer sight seeing. Ahhh sundresses
Word of warning though: if you happen to find an old Sony or buy this lens, remember to to disable it before letting the GF or wife use it. Made me sell it, she did.