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Title: Real multi-coated filter - Low profile
Review: It is a thin and real multi-coated filter. The best quality filter I have seen. I bought other generic filters like Massa, Zeikos etc; but they are just a plain piece of glass no matter what their description says.Sigma is a real filter. How do I know? If you tilt the filter in light reflection, the light bulb's reflection should appear green or blue. This filter reflects the light bulb with green tint, so it has multi-coating.It is very good and offers lens protection. I kept it on my lens all the time and will never take it off. Worth the money and do not go for cheap imitations. Sigma UV filter is the best for the money.
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