The filter was bought mainly as a lens protector. It has a diameter of 58mm and fits, for example, on the 18-55 kit lens from Canon. The filter is supplied in a hard plastic packaging in which it can also be re-stowed away when not in use. The material of the filter ring is made of metal. He seems high quality and fits perfectly into the lens. Once screwed wobbles nothing more, and the filter is fixed and flush connected to the camera. The filter glass seems to me to be very good. I could (with, sometimes without filter times) on various test photos, indoors or outdoors recognize no loss of quality. But I am of course just an amateur photographer. I find, therefore, personally, that the filter does its job well. When the sun shines (like the product image even promises) is achieved a reduction in the gray haze. However, such a strong difference, as shown in the picture, I could not tell. Positive is to be noted that the Polaroid filters are 10-year warranty. All in all it is a successful product. Those like me who is looking for a cheap lens cover, which is very well served with this filter. The filter has therefore deserves its 5 stars.