Originally Posted by
Steaphany
For portraiture, I would recommend a longer focal length than 50mm.
Something like a Sigma 85mm f/1.4 EX DG HSM or even a Sigma 105mm F2.8 EX DG Macro. The longer focal length will mean you do not need to get into your subjects face for a fill the frame image while also allowing better control of the depth of field to have your subject in focus while having a nicely out of focus background. The Sigma DG series lenses provide a full frame image circle and for sub full frame cameras, you are well within the best performing area of the lens.