And I want to respond to the comment that suggests losing the diaphragm. I disagree. I'm a professional photographer and just ran tests, I don't notice any loss of light. In this type of test it is necessary to be very rigorous, there are several possible approaches and I will give you one of them. 1/ Eliminate any outdoor light source that is constantly changing. I used LED lighting so I let the temperature rise nicely. 2/ To check the aperture of the lens you want to use, take a lens with an external aperture ring (I used a Nikon 50mm f/1.4D) on the adapter ring side. In this case it is important to set it to the closed position. It is the lens that takes control of the aperture. I set it to an aperture of 5.6. 3/Don't leave the sensitivity on auto (I set it to 400 ISO) 4/Take a photo of a very specific scene (you must have the same frame for the second photo) 5/Remove the ring and set a Fuji XF lens on the camera (I used the 16x50mm kit lens on the aperture first, or manual, of course the same aperture here 5.6). 6/ Take a picture of the scene (identical framing) and compare the speeds between the two photos. With a Fuji X-T10, the photo with the ring was darker, but the speed was faster. At the same speed, the photos are the same, so no loss of light. Now you should also know that each lens can have real differences in aperture compared to advertised values. Also, be careful when comparing speeds with another device. It is very likely that you have differences. Fuji, for example, cheats with the announced sensitivities. If it tells you ISO 200 you are actually at +- 120 ISO. Worse still, with an Olympus OMD EM10 I notice speed differences that can easily be doubled with a Nikon D800 (so 6400 iso Olympus = 3200 ISO on a Nikon D800 for example). Anyway, when a manufacturer announces that his device starts at 200 ISO and at 100 ISO there is a loss of dynamics, I understand that he is cheating on his 200 ISO, it is 100. Coming back to this ring: Personally, I don't find any flaws in it , except maybe its weight (130 g).

Fits very well, at least the adapter, which was delivered very quickly, is valuable. Dimming possible with rotating ring. Infinity setting guaranteed. Good quality.

already owned a K&F adapter (Minolta MD to Fuji X) and was already impressed by the quality. The adapters have no recognizable play on the bayonet, they are still processed cleanly, as far as I can judge as a layman. No sharp edges, no protruding parts. The adapter from Nikon G to Fuji X differs from other adapters by the aperture ring, which sits firmly and is pleasantly soft and valuable. The aperture can be regulated very well and there is still no play to be seen with this adapter, despite the obviously more complex design. Focusing works indefinitely. Absolute purchase recommendation!

Super processed, there is nothing to complain about. Nothing rattles, everything fits perfectly. The photos will be good too. All sample images taken with the aperture wide open. The only small deduction is for the somewhat imprecise aperture ring. But it is criticism at a high level. Just the fly in the ointment. But for the price it's totally fine. Nevertheless I would buy it again. Absolute purchase recommendation!

The adapter ring from K&F met my expectations. It was clear from the start that there was no adapter that operated the autofocus. Nevertheless, I was curious to see whether my high-quality FX lenses could keep up the quality of the Fuji. The adapter was easy to assemble and it was almost self-explanatory how to use it. (Here I would have wished for a small instruction manual, which also leads to a star devaluation). I tried several lenses. It is clear that a 70-200mm on the Fuji is oversized and you would need a tripod for it. But my 50 and 58 1.4 work great. Thanks to the good grip of the setting wheels on the adapter, they can also be focused quickly. The adapter also makes an excellent impression for sustainable use thanks to its high-quality metal feel. I'm sure I'll have a lot of fun with it. A little tip on the side in the XT2 you have to set in the menu that you want to take pictures without lenses, otherwise it won't work.

Fits like a glove - nothing rattles, nothing is too tight, a really excellent adapter that I can only recommend!

Quality at a low price! Absolute recommendation / again and again! toptoptoptoptoptoptoptoptoptoptop it doesn't get any better! seven more words a'la TOP or Super or Class!

the product works perfectly for this purpose. Solid design, good quality.

It's still a bit unfamiliar to set the aperture and distance by hand. But it works. I feel 40 years younger.

Prompt delivery, simple packaging, perfect product. Sits without play, infinity position ok. When using Nikkor lenses with an aperture ring, pay attention to the position of the ring on the adapter.