Nikon S8100 scene test.
Playing around with my camera I noticed the shots in Portrait mode in the scene selection seemed to be much sharper than any other mode for general use. You can clearly see in some of the images below it is in fact a good mode to shoot in instead of auto. Below are some 100% crops, The left image is shot with auto setting and the right image is Portrait.
How ever it fails to lock focus here. Notice the bin. Lock is much sharper.







