I'm looking for a 15mm-?? (I don't care, as long as it has a little zoom) super wide angle lens with f2.8 or less. Or something similar, 12-??? as long as it starts at 15mm or less and has some zoom. Don't forget that f 2.8 or less, I don't want any of those f4 lenses!!! They dont do me any good! Does this lens exist? If so, who makes it? I am open to any and all suggestions. My credit card is ready and willing, $5-$1000. I want something that has been reviewed well, and is SHARP. Wedding photography. I am motivated to purchase before my next wedding.