With modern cameras, the use of a UV filter is actually no longer necessary. I therefore use the UV filter more to protect the front lens against scratches and dirt. I did not observe the often-reported reduced image performance (when using filters), so protecting the expensive lens is more important to me. I did not notice any color differences thanks to the multi-coating. However, I also did not notice any improvement in contrast or sharpness, but this is more due to the good coating of my lens and the use on a modern DSLM. This will probably be different on an "old" analog camera. Unfortunately, I was unable to test this because I do not have a lens with a suitable filter diameter. Thanks to its slim brass mount, the filter can also be used on wider wide-angle lenses. I use the filter with a 24-70mm lens on full-frame. Due to its design, the minimum focal length should be around 17mm on full-frame. The mount is cleanly manufactured and fits well into the thread on the lens. The filter comes well packaged in a sturdy leather case. Once the filter and case are removed, the outer packaging can also be used as a picture frame. Included is a stand and a cleaning cloth for the filter. Everything feels very high-quality and expensive.