content: I (foolishly) purchased this filter to place upon a Tokina 12 - 24 mm Nikon lens, exactly the same as Gatorvalenz, because I was too carried away with the 'buy me too....' approach engendered (and desired) by Amazon. That's fine, my mistake. It cost an additional USD 30 to buy a filter that would work effectively with the Tokina lens. As a side note (almost...) this filter comes with the WORST packaging I have ever seen. Fine if you buy from the store, but not so great (for me...) when the filter traverses 10 time zones via Fedex/UPS/Other Carrier of Your Choice. Luckily (and this was probably pure luck...) the filter was OK - but useless for the intended use!