Metabones Rollie QBM Lens to Micro Four Thirds Camera Lens Adapter (Black)

Costs a little more, but worth it

I previously bought the Fotodiox Pro Rollei 35 to MFT lens mount adapter, to adapt my Rollei macro and telephoto lenses to my Panasonic Lumix GX7. It worked fine with the lenses, but would NOT fit my Rollei bellows unit or extension tubes. Logically, if it fits the lenses, it should fit the bellows and tubes, but it doesn't. I have no idea why, nor did B&H or Fotodiox when I contacted them with the problem. I then asked B&H if the Metabones unit might be more accessory-compatible, but they had no idea, which was perfectly understandable considering the oddball nature of the problem. In the spirit of you never know 'till you try, I went ahead and ordered the Metabones unit. I considered returning the Fotodiox adapter,but, not knowing if the Metabones adapter would be any better, I reluctantly decided to keep the Fotodiox one. The happy ending is that the Metabones adapter works perfectly with every lens and accessory (I still don't what the difference is, but it's real). It also has a (removeable) Arca-Swiss-type quick-release foot that eliminates a lot of strain on the MFT camera's lens mount from the larger, heavier Rollei lenses, especially the long telephotos. The only improvement I could suggest would be to make the foot's stalk about a quarter-inch taller. That would allow clearance for any quick-release camera plate that you might have mounted on your camera (I use an Arca-type L-bracket on my GX7). Anyway, problem solved, great product!