How small is nano? Magnification needed...dark field cannot see nano, electron can.

Many have posted 'dark field microscopy nanobots' on the web.
Dark-field microscopes maginfy up to 1000x. To see nano-sized objects one needs a minimum of 250,000 X magnification.
What we may be seeing in some of these videos is structures of millions of nano objects connecting together in the DF range. We are seeing something that looks an awful lot like circuitry. And then there's the magnetic issues many have showm with metal objects sticking to their arms, foreheads. Hoax or not?

-found on rense.com