Do you ever take black and white images on your nex? If so what iso do you usually use. Often times the shutter speed is so slow i end up getting blur from the individual moving around while the pic is taking place.
I convert some shots to B&W after I put them on my PC.
Black & White - a set on Flickr
If you check out some of those, the cam settings are listed...
What mode are you shooting in? I shoot in Manual mode... in daylight I set the ISO at 100-200, overcast is usually 200 or 400, and if I'm indoors and in low light I put it at 800. I rarely have to push it to 1600...