I am thinking of getting a wide angle prime lens. I've been looking on B&H and found Nikons 3 wide angle prime lenses that offer super large apertures. They are the: Wide Angle AF Nikkor 28mm f/2.8D Autofocus Lens Wide Angle AF Nikkor 24mm f/2.8D Autofocus Lens Super Wide Angle AF Nikkor 20mm f/2.8D Autofocus Lens Now the 20mm lens is twice the price of the 28mm lens. Is the extra 8mm really worth the double price? Or should I settle in the middle and get the 24mm? Any pictures from any of these lenses would be great! Please say which lens it is.