Comments about Adorama Pro Optic 0.42x Semi-Fish-eye Auxillary Lens for 58mm Filter Threaded Lenses.:
Don't waste your money or time on this. If you're looking to get a fish eye effect cheaply, this won't do it. Slightly distorts straight lines, the focus is only sharp directly in the center of the image and the rest is a fuzzy mess. It's not worth [$]. I'm sending mine back.