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!

Mounted on a wide angle lens, the rendering on water / lake pictures is perfect.
Rigid carrying case to avoid damage.
Good image quality. I did not notice any vignetting or color modification.

Actually, I'm not a fan of super wide-angle photography: Everything that goes over 24mm doesn't have to be. Nevertheless, I needed this lens for a specific purpose: Milky Way photography. However, since I can only run it once or twice a year, I didn't want to spend huge amounts of money. This lens gives great results with the Canon 6D. My recommendation: stop down one stop to aperture 4 and ISO 3200/64000 with an exposure time of 25 seconds. The small gain in sharpness easily compensates for the loss in light intensity. The latter can be compensated to the same extent in post-processing, but of course not sharpness. This also gives you a bit better control of the coma (which is hardly a problem with this lens anyway).

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

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.

Hi use the filter on my wide angle lens. Unfortunately, at the max setting, a lens flare forms, which unfortunately doesn't look so great. At min setting it is ok (no lens flare) Processing is super. Unfortunately only conditionally usable. ML

I bought this ND filter for my wide angle lens and am very satisfied with one thing. The filter is well processed and makes a high-quality impression. But when the filter is on the lens, unfortunately the lens hood no longer fits on it because the front ring is slightly larger than the lens diameter. So far I could not see any color cast in the pictures I have taken so far.

I use the 67mm version of this filter. Since there are no external threads to mount a hood (I use this with a stepup ring for other lens sizes), I use a 67mm Amazon product ($9.50 for two) "67mm Camera Lens Hood - Rubber - Set of 2 - Collapsible in 3 Steps - Sun Shade/Shield", Mount the rubber hood BEFORE the VND, fold the rubber back over the lens, then mount the VND, set it where I want it, then pull the rubber hood out over the VND adjustment ring. A little awkward, but it works.