It can do video previews, processing, and dark field correction. (geekwrapped.com)
The urine sample must be fresh and most animal hospitals do not have the capability to do dark field microscopy. (marvistavet.com)
a) Gold nanoparticle catalyst (Au / HAP - NC), b) Images of gold nanoparticles (black dot in red circle) through Transmission Electron Microscope, c) Annular Dark Field of gold nanoparticles through Scanning Electron Microscope. (sciencedaily.com)