The lens turns out to be exceptionally sharp when stopped down a bit. slightly soft with loss of contrast wide open, but still usable. I think it will be a very nice for low light/indoors. One side of the lens is slightly softer than the other, I am sure this is due to the home made adapter. One thing I do not like much, is the bokeh. It's less than pleasing to my eyes. But, this is the first time I shot with the lens, perhaps I shouldn't conclude so hastily.
Helios-103 53mm f1.8 on the NEX-6. Click for larger.
Bokeh - Helios-103 53mm f1.8 & NEX-6 @ f1.8. Click for larger.
Man at work - Helios-103 53mm f1.8 & NEX-6.
Old & New - Helios-103 53mm f1.8 & NEX-6