I originally bought the Hoya Pro1 Protector because I thought that I can save myself the extra cost for HD. Meanwhile, I have switched to HD and not looked back. Even the Pro1 is a good protector but he differs from the HD especially the fact that one is very difficult get it clean again. As you filter changes every now and then, naturally arrive inevitably fingerprints etc ... plan and even against dust is not a filter immune. Unfortunately, it is very difficult to clean the Pro1 again, streaks remain almost always returns. When HD This is very easy and fast because of its nano-coating. According to the Hoya HD is also more robust, ie resistant to breakage. However, I was fortunate enough to have not test yourself. I am very pleased with the HD and drag it despite the extra cost Pro1 ago.
