I recently purchased a K&F Concept 72mm filter for my 50 1.4 zeiss lens and have been extremely happy with its performance. The filter was easy to screw onto the front of my lens and fit perfectly, with no vignetting or other issues.

One of the main benefits of using a UV filter is that it helps to protect the front element of my lens from accidental damage. This is especially important for my fancy lens, which is a high-quality and expensive piece of equipment. The filter is also useful for blocking out UV light, which can be especially helpful when shooting in bright sunlight or at high altitudes.

In terms of image quality, I have noticed a slight improvement in the overall clarity and color accuracy of my photos since using the UV filter in the Colorado mountains. Blues and purples in particular seem to be rendered more vividly and accurately.

Overall, I am extremely satisfied with my purchase of the filter. It provides excellent protection for my lens and also helps to improve image quality. I would highly recommend this filter to any photographer looking to protect their lens and improve their photos.