Sony Alpha DSLR-A290 Instruction Manual page 170

Portrc- lenses
As the proud owner of an ex digital SLR camera.
a portrait lens is probably one of the first
interchangeable lenses you will want to
add to your kitbag. Why? Because while
standard zoom lenses are great for general
use. a purpose-built portrait lens makes it much
easier to obtain the professional-looking results
you've always wanted.