The Siocore does its job perfectly and does not swallow this as much light as many expensive competitors. He does not diminish the image quality, as far as I can check with my limited testing opportunities. On the contrary! By reinforcing the colors look the recordings even slightly sharper. This shows a picture on the asphalt of a road. Without filter: gray unit area, with filters: struktuierte area by nightfall of the individual stones.
The material of the ring makes a solid impression. The thread is cut cleanly and is almost by itself to its place on my "Canon EF-S 15-85". The ring is a hand so flat that no vignetting caused, but then he is so high that he can still hold good if one side attacks the inside to the sun visor down.
It can be a hand easily rotate, but on the other hand so much inertia that he is not pretending of their own. If the point of the greatest filtering effect first found you need eh readjust only marginal unless the filter has twists. The glasses are lt. Manufacturer multicoatet that minimizes flare and dust adheres less readily. In plastic storage box of the filter for the transport is well protected. Therefore, the filter gets Siocore 5 Stars.
By the way: On the Box is quite coyly indicated a link. With this address, there is a global Chinese companies in the photo industry.
The only complaint is the packaging. The filter can put in a Jiffytasche and again. In a carton This is called overpack! The padded envelope would have done it, then the shipping costs would be lower, because they are almost 5, - really steep.