A 90mm prime telephoto lens with 1:1 macro capability, it provides an f/2.8 maximum aperture for low light effectiveness and shallow depth of field control. Compatible with full-frame E-Mount cameras, it can also be used on APS-C E-Mount cameras with an angle of view equivalent to a 135mm lens in the 35mm/full-frame format.
Only the middle groups of the optical system move to achieve focus, so the overall length of the lens does not change. Other important benefits include fast autofocus and a short minimum focusing distance. Also, the filter thread at the front of the lens does not rotate, which is convenient if you're using a polarizing filter.