Best portrait lens for the sony a7s ii?

Here is what the site says about that.

From Sony a7S II: Sony a7S II: A mirrorless camera by Sony with a 12.2-megapixel full frame sensor, announced in 2015. Specs - Maker: Sony - Mount: Sony E - Sensor: Full frame, 36 x 24mm, crop factor 1.0 - Resolution: 12.2 megapixels - Stabilisation: in the body - Announced: 2015 - Type: mirrorless camera Focal lengths on it Full frame is the reference size: lenses frame as marked. A lens made for APS-C works with the ...

From Sony a7S: Sony a7S: A mirrorless camera by Sony with a 12.2-megapixel full frame sensor, announced in 2014.

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