So I picked up a couple of 4/3 lenses which are quite nice. I figured that the cheap copies of the Oly or Pany converters would work just fine. After all, they have no glass and only transmit the signals from the body to lens and back, right? Well, today I learned a lesson that cost me some nice shots. I took my Zuiko 9-18 4/3s lens along with the Fotasy adapter to do a shoot. I got to the place and took a good number of shots with the 12-40 f2.8 and a couple with the Pany 35-100 on the E-M1 body. No problems with the function of either lens. When I tried to use the Zuiko 9-18, at first I got a black screen ... So I removed and re-installed the lens on the body and got a picture in the display and EVF. Fine, now I want to shoot... Guess what, the camera controls wont work to change the aperture and basically the aperture and other info don't even show up in the display! WTF! Got scared and though my E-M1 had failed. So I took off the 9-18 with the adapter and replaced it with the 12-40 f2.8..... It worked perfectly! Now, I got home and tried the Pany 4/3s to M43 adapter that I (luckily) purchased a while back. I attached it to the E-M1 body and mounted the 9-18 lens on it, and it worked perfectly well.... The lesson is that even relatively simple adapters like that can be made poorly enough that they will fail. I have wasted whatever $$ I spent on that crappy adapter, and worse yet, I missed some good shots. The noral of the story is, don't waste your money and time on cheap Chinese garbage. Go ahead and spend the few extra bucks and get the real deal!