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A Canon patent was found over at <a href="http://www.northlight-images.co.uk/canon-ef-lenses-rumours-and-news/">Northlight Images</a> for a 50mm/1.8, which was replaced relatively recently, and a APS-C 30mm/1.8 lens has appeared at the Japanese patent office (No. 2017-102352 )</p>
<p><strong>Full frame lens specifications:</strong></p>
<ul>
<li>Focal length 51.60mm</li>
<li>F number 1.85</li>
<li>Field angle 22.75</li>
<li>Image Height 21.64mm</li>
<li>Lens total length 84.19mm</li>
<li>BF 39.08mm</li>
</ul>
<p><strong>APS-C lens specifications:</strong></p>
<ul>
<li>Focal length 30.90mm</li>
<li>F number 1.85</li>
<li>Field angle 23.85mm</li>
<li>Image height 13.66mm</li>
<li>Lens total length 84.50mm</li>
<li>BF 35.50mm</li>
</ul>
<p>There has always been rumbings about a “good” EF-S prime coming and 30mm has been passed around over the years, however nothing has every come of it.</p>
<p>The EF-S 35mm f/2.8 IS STM Macro hasn’t started shipping yet, while a very neat looking lens, it’s not exactly the “fast” prime people have been looking for from Canon for APS-C shooters.</p>
<p><a href="http://www.northlight-images.co.uk/canon-ef-lenses-rumours-and-news/">Northlight Images</a> does say that they’ve been told to expect a “good” EF-S prime in the future.</p>
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