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<a href="http://www.northlight-images.co.uk/canon-ef-lenses-rumours-and-news/">Northlight</a> has uncovered a lot of <a href="http://pdfaiw.uspto.gov/.aiw?PageNum=0&docid=20180095242">new lens patents from the USPTO</a>, some of the more interesting ones include new glass types for various long lenses, including an example for a new EF 70-200mm f/2.8L IS. A lens <a href="http://www.canonrumors.com/a-new-ef-70-200mm-f-2-8l-is-iii-still-a-possibility-in-2018-cr1/">we think still has a chance at coming later this year</a>.</p>
<p>This patent centers around the use of glass with high dispersion and negative anomalous dispersion.</p>
<p>Just a reminder, expect to see the <a href="http://www.canonrumors.com/the-canon-ef-70-200mm-f-4l-is-ii-is-coming-in-april-cr3/">EF 70-200mm f/4L IS II to be announced this month</a>.</p>
<p>A bunch of other optical formulas for long lenses, including an EF 400mm f/2.8L IS are <a href="http://pdfaiw.uspto.gov/.aiw?PageNum=0&docid=20180095242">included in this patent application</a>.</p>
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