As long as you know you won't likely be able to use the full range, this is a good deal (see video). The "X" pattern is almost certainly a sure thing with this kind of range. Still, the price is right.

Good workmanship, also comes with several ring adapters. Just as good as many "similar" ones, but that also comes with a wide range of adapter rings. Good fit and well made. -1 for the tiny little brass release clip, but use carefully and the holder won't fall off. Would recommend.

Fits perfectly I've actually tried it with several lenses. Lenses with a simple PK mount also work well. In this case, make sure you set the aperture ring of this adapter to the narrowest and controlling aperture over the original aperture ring on the lens. The reason for this is that the original aperture ring allows you to choose half-stops. With this adapter you can set full stops. When used with a DA/D-FA adapter, the aperture is set using the adapter's aperture ring. It allows you to set full stops. Better than nothing and it spins smoothly, with light clicks. The construction is of high quality, the interior is matte and non-reflective and comes in a beautiful box. The E-mount portion snaps comfortably into place, no hassle there. The PK side is a little tight on certain lenses, but as a benefit it doesn't wobble at all. Recommended!

This adapter turns a cheap Canon M camera into a professional one. Simply combine it with the full-frame lenses without an L fixed focal length.

Great adapter in its price range. I don't notice any particular flaws, the tolerances look very good. Finally, K&F decided to paint the interior with anti-reflective paint.

Have (as I'm sure most) no comparison to the Canon original adapter, which costs about 2-3x as much. The adapter works as expected for me in connection with a CANON EOS M100 and a Canon EF-S 55-250mm, I don't know what the original should be able to do better. Autofocus seems slower than with the EF-M standard 15-45 kit lens, but is sufficient for my needs. Covered the range from 15-250 inexpensively. Can't imagine that I noticeably miss the missing range between 45-55. Snaps in perfectly on both sides, sits firmly without misaligning in any way. It seems to me that it is built a little unnecessarily too deep, but I don't know whether the distance has to be like that for optical-physical reasons?

With this adapter I can use all my Nikkor or Nikon lenses on the Fujifilm E-X1. However, it is necessary to set the “Shoot without a lens” option in the menu, otherwise the shutter button will not click. The diaphragm is closed by the intuitive ring. I tried it with a G Sigma EX 1 lens; 4-5.6 with 10-20mm focal points (equivalent to 15-30mm of a full frame): The ring allows you to close the aperture while maintaining full aperture for manual focus, from 24cm to infinity. Of course, the Fuji ring works better for Leitz M lenses, since it is enough to set "adapter" and focal length and any distortions can be corrected. But it costs more than ten times as much. Focus is obviously done manually as with digital and analogue Leica Ms. The courier was unable to deliver on the scheduled day, claiming that "no one was there". Instead we were all there. Saturday to Monday. Then don't complain if Amazon will use drones.

had read the recessions over and over again. Should I or not? I wanted to get a WW for my D610 that would meet the requirements for landscape and Milky Way photography. Admittedly, I was skeptical. But I was not disappointed! There is nothing to complain about in terms of sharpness and contrast, both in sunlight and in astrophotography. Ok, with an open aperture and 100% magnification, a slight drop in sharpness was to be expected compared to my Nikkor 24-120. But especially with landscape shots, stopped down to 5.6, full sharpness is already achieved over the entire range. The only downside is that the lens hood is fixed. Unfortunately, no screw filters or flat filters from the normal range can be used. That would of course be ideal for landscape shots. There are special solutions for this lens, but they are relatively expensive.