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New patents for supertelephoto optical formulas have appeared at the USPTO.</p>
<p>The range of formulas is quite vast, all the way from a new EF 300mm f/2.8L IS to a new EF 800mm f/5.6L IS design.</p>
<p>We do think there will be some new “big white” lenses announced in the next 12 months, not including the EF 600mm f/4 DO IS. We’ve heard from at least one person that Canon may take the EF 200mm f/2L IS back to its f/1.8 roots. Though the latter hasn’t yet been confirmed.</p>
<p><a href="http://www.northlight-images.co.uk/canon-ef-lenses-rumours-and-news/">Northlight-Images uncovered a lot of the patent applications</a>, you can view them all here over at the USPTO. [<a href="http://pdfaiw.uspto.gov/.aiw?PageNum=0&docid=20170351113">1</a>, <a href="http://pdfaiw.uspto.gov/.aiw?PageNum=0&docid=20170351089">2</a>, <a href="http://pdfaiw.uspto.gov/.aiw?PageNum=0&docid=20170351060">3</a>, <a href="http://pdfaiw.uspto.gov/.aiw?PageNum=0&docid=20170351059">4</a>, <a href="http://pdfaiw.uspto.gov/.aiw?PageNum=0&docid=20170351058">5</a>]</p>
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