Hot answers tagged optics
It is pretty much impossible to build a lens with that wide of an aperture that is also so long. As mentioned, at 200mm the lens opening is 166mm at f1.2. This would be a physically immense lens, even more so a fi it's a zoom. If we restrict ourselves to an aperture that's realistic (say f2.8), the only issue is that such a lens will need to be very, very ...
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