In addition to the Kiwifotos lens filter adapter for my Sony RX100 V, I bought this gray gradient filter from K&F Concept after having also had very good experiences with the other products. I read again and again that the filter could not be unscrewed. I can't confirm that. At least for the size of 52 mm I ordered.

The practical test is convincing. It is currently not sunny but clouds are often difficult even in very cloudy weather. I hope you can look through the pictures in the right order. For someone who knows their way around, it should be clear: The third picture is pure without the filter. In the fourth, I tried to improve this image in RAW post-processing and you can see that there are still burnt out areas. The first picture is with a filter and you can already tell: The clouds are already more detailed. But the window frame also gets darker, of course. The post-processing, which can be seen in the second picture, requires more effort to create such a scene. But I think the result is also impressive!

As with the other filters from K&F, I didn't notice color casts, vignettes or the like.