I made test-shots with the Nikon mount Sigma 30 - 1.4.
This lens is another prove for how much the sensor of the NEX-7
screams for good glass. but, judge by your own. Some shots are cropped,
some in full size. The adapter i use allows to open and close the lens diaphragm,
but, the range is from 1.4 to some 13. Precise settings can not be given,
so, I will just tell wide open or closed what means we are around F13.