Quality product ... 5 stars

Have brought the filter as protection against pollution and UV protection (beach holiday). Lens: 27mm Fujifilm Pankcake.
No error, threaded with high precision (even after repeated screwing and unscrewing no scratches or similar). Just a great product, will also remain with B + W.

What you need to know:
If you read a little deeper into some online forums a so it must be noted that a UV filter at a new Digital CSC is not absolutely necessary - is depending on lens, I'd go along but no abnormalities or defects in image quality. This is for professionals safely again its own theme.