... With the filter I am quite satisfied. It can be achieved with sunlight exposure times of 30-45 sec. In daylight. Even on cloudy days and up to one minute. Since I have no comparison to an identical filter, I can make no real information about the picture quality. For my applications (long exposure water with moving clouds) but the filter is sufficient. Mainly because I can combine my Cokinsystem with this filter. The box in which the filter is supplied is robust and the filter cover is quite useful