The 10.5mm and 4.5mm are DX format lenses.For the time being, I am sticking to DX format, as FX lenses are rather large. You could use on full frame, but you will not have full coverage of all of the pixels of your sensor. Nikon apparently have a patent on curved ccds, but these things often take a while to hit the market. Apparently, a fluid lens near the ccd can be used to get 3x zooming with the benefit of curved sensors.
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