The Nex (5r) is in itself a great camera, and comes with the combination of touch Lupe and the peaking function really ingenious tools for easy manual focusing with. So it was necessarily just a matter of time to pack the old M42 lenses solely out of curiosity at the Nex. After one week, the adapter Zoom is barely off and manual focusing a lot of fun. And with the pivoting upwards monitor the Nex I feel restored to the medium format time.
+ Good workmanship + Wobble-free seating at the E-mount + Thread for lenses fit - It comes in the picture not all over, that the adapter is about 30mm long (not really tragic, but compact is different.)