First, if you are using AF camera, make sure the polarizer filter is circular. Second, what other lenses do you have that take filters smaller than 49mm? If none, then you need step down ring (not step up) but that will most likely not work due to vignetting. Other than that, I would go to bhphoto.com web site and try to price the filters. When you come up with total, you will know if that's a good deal or not. To me if you pick about 7-10 filters from the set that you will use, then it is an OK deal. But if you are interested in 2-3 filters only, then you are better of buying them separately.
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