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<p>A few patents showing optical formulas for a 200-500mm lens from Nikon have appeared.</p>
<p>Nikon Rumors reports that Nikon will indeed announce such a lens, though at present, the speed of the lens is unknown.</p>
<p>Canon is also <a href="http://www.canonrumors.com/2015/05/canon-developing-a-new-slower-supertelephoto-lens-cr2/" target="_blank">rumored to be developing a supertelephoto lens</a> with an aperture slower than f/4, it’s unknown if the development includes a zoom.</p>
<p>More to come…</p>