On APS-C format cameras, for which it is specifically designed, the
SAL50F18 functions as a moderate telephoto lens (equivalent to 75mm on
a full-frame camera) that can be ideal for shooting portraits as well as for
framing and isolating areas of interest in broader, busier scenes. Not only
can you isolate the desired subject matter by framing, but you can also
take advantage of the lens’s large F1.8 maximum aperture and circular
aperture design to isolate your subject from the background by using
defocusing. The large maximum aperture also facilitates shooting in low
light, a capability that is further enhanced by SteadyShot INSIDE™ image
stabilization featured in a series bodies.