The filter is so far well made, where one can expect at the price also. No pattern, clear picture. The last recorded images very colorful mountains and rocks in the western US I mean, to have found a slight tendency towards orange. This can be corrected surely, should at this price but actually do not occur. Another small drawback: it is relatively thick. I take him to an ultra wide angle, so that vignetting almost always occurs (no additional filters such as UV or similar before screwed). All in all I'd go with a renewed acquisition of a Slim Line variant.
