have a Sony A7iii and I was looking for a good adapter for my 2 Canon lenses, 85mm f/1.2 and 11-24mm wide angle lens. This K&F Concept Adapter fits my Sony A7iii well and supports the lenses. I was skeptical about the sharpness of the photos. However, this adapter really nails the sharpness. It's better not to use the widest aperture, because lenses from other manufacturers work extremely poorly. Both sample photos were taken with this adapter. The shot in Florida was taken with the wide-angle lens. The mountains are recorded with 85mm. Autofocus is excellent on a 7iii body, so I didn't see any significant difference between using the adapter and the native lens. Eyefocus works very well even in low light conditions. The good thing is that I was expecting a lot of vignette, but I was surprised to find out that this lens doesn't produce a large amount of vignette. So the bottom line is that you should give this adapter a try. It fits well, not too tight like some cheap adapters. The build quality is really good. Happy clicking!

The adapter works very well and all lenses from wide angle to tele and tamron to sigma worked with the camera without any problems. I even found the Canon EOS M's sluggish autofocus to be a little quicker. Now I can use my Canon 60D and the EOS M together without having to change lenses every time. Clear purchase recommendation.

Exactly what I was looking for, a light, bright UWW to be able to photograph stars. Otherwise, the wide-angle range is covered several times for me (Nikon 16-35, Nikon 20mm/1.8, Sigma 12-24mm second version). So I ordered it and tried it out, I got hold of one from a Dutch retailer via Amazon in September, even with a 5-year guarantee after registration. My test setup in the basement, a wall unit with a test panel in the middle and one in each corner. I had already tested other lenses with it and discovered weaknesses (slightly muddy corners due to decentering) that I had not noticed in everyday life. In any case, the surprise, the K&F Concept already shows almost the same sharpness in all corners as in the middle at an aperture of 2.8! The further stopping down mainly brings an improvement in vignetting, from f4 this is almost non-existent (there is currently no lens profile for the Nikon version). For this test, the camera (D800) was of course placed on a tripod and aligned with the virtual horizon. The parallelism to the wall was checked with a meter stick and an auxiliary ruler. The so-called glacier fracture test no longer works with the extreme focal length, since the corners warp due to the tilt of the camera when panning (physically caused). Enough theory, the moment of truth came in the Dolomites during one of my first attempts at milky way photography. The conditions were ideal, the result fantastic (first picture, not the final edit yet). The last image shows a 100% crop of the same but unedited RAW image from the top right corner(!), only the exposure was increased by one stop. I would be happy if there would soon be a lens profile from K&F Concept for the Nikon version, unfortunately nobody answered my email. Otherwise I am very pleased with the results. I sent the Irix 15mm back straight away, it was neither visually nor haptically appealing, only the filter suitability would have spoken for it.

The filter works best if you have a lens that is greater than 35mm. When the lens is too wide angle is when you get the X looking area

A really good tripod, holds my Nikon D 850 with a wide-angle lens, the 14-24mm, f2, which is no lightweight bombs. A short center column without the second head would have been ideal. Highly recommended as a trip and hiking tripod is in any case the customer support, very quick response, and fair to the customer

It works on my Nikon with no problems, including the autofocus. I'm happy with that.

Great, finally I can take wide-angle photos with my 14-24 mm, 2.8 G from Nikon. However, you have to be careful when focusing manually. I recommend a tripod.

Got this to reduce overexposure with wide angle Canon 17-40 4L lens. Very happy with the results so far and it's really great for long exposures. I've been a K&F lens filter for a number of years and these have been my primary ND filters.