This may have a simple answer or it may have no answer ... I'm looking into getting a 77mm cross-screen filter for my new lens, and I was looking on B&H, but there are 6 different ones. 4 of them are in stock: "B+W 77mm 4x Cross Screen 684 Star Effect Glass Filter" for $59.95 "Hoya 77 mm Star 4 Pro 1 Digital Multi-Coated Glass Filter" for $91.50 "Hoya 77mm 4x Cross Screen Star Effect Glass Filter" for $44.95 "Tiffen 77mm 4 Point/2mm Grid Star Effect Glass Filter" for $79.36 So 3 different brands but that range in price from $45 to $92 ... over a factor of 2x in price. Now, I read the shpeal about why Hoya charges 2x as much for one vs. the other, but I honestly don't know how much of it is just marketing b.s. And why is there such a spread between the three brands? I'm just confused. And though this is just one kind of filter, the question really applies to pretty much all other filters. What are major differences, and why go with one over the other?