Filter Reviews

This Sony VF-MP5K marine filter is either a UR-PRO, or the next best thing, and will restore the natural colors lost underwater due to the properties of water ("Roy G Biv" is the memory device we use to remeber the order of "disappearing" colors as we go underwater- Red is the first, the UR-PRO "restores" this.) In good visibility conditions, the filter will be good to at least 20 meters / 66 feet. The depth will diminish with decreased visibility, and this filter is NOT what you want for cold, turbid waters of, say, Northenr California. But it works quite well in decent vis and tropical waters (but remove it and tuck it away if you are very shallow, 3 meters / 10 feet.)

The VF-58CPKS kit including a PL filter and an UV filter is supposed to support 58mm camera such as F717.
But in your introduction it's been changed to Wide angle and support the 37mm lens? Maybe it's a big mistake. Below is from Sony:

Circular Polarizing Filter Kit
VF-58CPKS
Use this circular polarizing filter to suppress unwanted reflections off glass and water and protects lens from dust and scratches at the same time. It fits a Sony 58 mm diameter lenses

58mm is the lens front diameter, and the 37mm is the focal length of the lens. These are somewhat independent values. Because of possible vegneting, particular polarizer filter can't be used with the whide angle lens, that has focal length lesser of certain minimal value (37mm in case of Sony VF58CPKS, as I get it).

Suppresses unwanted reflections off glass and water, protects lens from dust and streaks, and fits 37mm diameter....great buy for your digital camera/camcorder