HOYA 72UV 72mm Ultraviolet Filter for Camera Lens

I am a beginner to DSLR photography. I recently bought an expensive (for me) 18 - 200mm lens for my Nikon D40 and wanted to protect that purchase with a UV filter. I chose this one based on price. Unfortunately, this filter has led to distorted photos for me. It's OK outside in normal sunlight; however with pictures that I take inside (particularly when using the flash), areas such as people's hair get a weird looking sheen (for lack of a better word) to them. It also seems to cause a less than sharp focus. I finally took the filter off after a couple of serieses of disappointing photos, and now my pics look as sharp as ever again.

This was the first filter I ever used and I am happy with it. There are no scratch marks when I received it and it doesn't feel cheap. Its made in the Philippines but it was a decent price. I also heard it is a better construction than Canon's version from reviews.

Its good for protection of an expensive lense

Does what I needed it to do.
I will recommend for protecting those expensive lenses.

Bought this item as a front element protector. Hoya has decent quality glass, excellent filter threads (both male and female), and an affordable price for photographers on a budget. I would definitely buy Hoya filters in the future and recommend them to others.