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A patent showcasing a host of optical formulas from Canon has <a href="https://www.canonnews.com/canon-patent-application-variety-of-lenses-discussed">appeared over at Canon News</a>. These patents deal with small focusing groups that allow for light and fast autofocus performance, perhaps more geared to STM than to USM motors being used.</p>
<p><strong>Optical Formulas Covered in the Patent:</strong></p>
<ul>
<li>11-22mm f/4-5.6</li>
<li>24-70mm f/2.8</li>
<li>35mm f/2.8</li>
<li>18-150mm f/3.5-6.3</li>
</ul>
<p>We’re not sure if these are EF, EF-S, or EF-M lenses, or a mixture of all three mounts.</p>
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