<http://schema.org/image>
<http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2013/08/Microscope-520x245.jpg>
<http://thenextweb.com/gadgets/2013/08/26/turn-your-smartphone-into-a-microscope-for-just-15-with-micro-phone-lens/>