<http://schema.org/description>
"Canon produces a large variety of lenses suitable for different kinds of film and digital cameras. The difference between Canon EF and EF-S lenses is that each type of lens can only be adjusted to the correspondent mount of the Canon camera. We will discuss the differences between the"^^<http://www.w3.org/2001/XMLSchema#string>
<http://theydiffer.com/difference-between-canon-ef-and-ef-s-lenses/>