The adapter is used on a Lumix GF6. It is made entirely of metal, is of very high quality and fits 100% exactly on the MFT connection. Slides smoothly into the camera body's locking point with a quiet click. Nothing wobbles and everything fits tight and without any play. The same goes for the lens side. The lens clicks into place with a quiet click without getting stuck. It can be released just as easily by lightly pressing the release button. I have been using this adapter for about 3 weeks now and have taken about 500 photos with it. The resulting photos are amazing. I can't report any dull images or lack of contrast due to areas where light could enter the adapter. On the contrary, depending on the camera setting, the images are razor sharp, have beautiful bokeh, or, or, or. I mainly use a Minolta MC Rokkor PG. 1:1.4 - f: 50mm. You can even activate the magnifying glass function by tapping the touch display, so that the subject can be enlarged and focused without any problems. It may be that the more expensive adapters, which cost well over €100, are of even higher quality - but I can't imagine if I would be able to tell the difference in a blind test. I have absolutely no complaints about this part and I am very happy that I can use all these old analog lenses for a small amount of money. Among other things, I also have a Vivitar with f:100-300mm, which weighs at least 904 grams, with an adapter hanging from it, and I then took photos from a tripod. This meager kilo of glass made no impression on the adapter; the telephoto hung as tightly and snugly on the camera as the much smaller lenses and took first-class photos. Based on these experiences, I can recommend the adapter without reservation.