Patent: Canon EF-S 9-20mm F4.5-5.6 IS

[Canon Rumors]

A patent showing an optical formula for a Canon EF-S 9-20mm F4.5-5.6 IS has appeared. I would assume this was part of the development for the EF-S 10-18mm f/4.5-5.6 IS and that there isn’t another wide angle zoom coming for APS-C.</p>
<p>Patent Publication No. 2015-31869 (Google Translated):</p>
<ul>
<li>Published 2015.2.16</li>
<li>Filing date 2013.8.5</li>
<li>Zoom ratio 2.07</li>
<li>Focal length 9.50 14.52 19.70</li>
<li>F-number 4.64 5.21 5.80</li>
<li>Half angle (in degrees) 55.17 43.26 34.74</li>
<li>Image height 13.66</li>
<li>Overall length of the lens 143.95 134.71 134.11</li>
<li>BF 38.00 47.58 56.42</li>
</ul>
<p><strong>Canon EF-S 10-18 f/4.5-5.6 IS STM $299: <a href="http://www.amazon.com/gp/product/B00K899B9Y/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00K899B9Y&linkCode=as2&tag=canorumo-20&linkId=SYUOCVQGBCUI2BEC" target="_blank">Amazon</a> | <a href="http://www.bhphotovideo.com/c/product/1051476-USA/canon_9519b002_ef_s_10_18mm_f_4_5_5_6_is.html/BI/2466/KBID/3296" target="_blank">B&H Photo</a> | <a href="http://adorama.evyy.net/c/60085/51926/1036?u=http://www.adorama.com/CA1018.html?kbid=64393" target="_blank">Adorama</a></strong></p>

 

[Maximilian]

I assume that you are right and this patent isn't coming to live.

But it would be nice, if Canon was trying to get a wider APS-C UWA.
But then the aperture should have been a bit wider.

 

[cosmopotter]

It is POSSIBLE that it could be a replacement for the long-in-the-tooth EF-S 10-22 USM... afterall, the 10-18 is quite new and quite cheap.

 

[The Supplanter]

It is POSSIBLE that it could be a replacement for the long-in-the-tooth EF-S 10-22 USM... afterall, the 10-18 is quite new and quite cheap.

True, but as far as speed, nothing differentiates this patent from the current 10-22. In fact, it's slower!
I guess for UWA fun, I'll have to get a full frame with the 16-35 f4.

 

[Mt Spokane Photography]

It is POSSIBLE that it could be a replacement for the long-in-the-tooth EF-S 10-22 USM... afterall, the 10-18 is quite new and quite cheap.

I do not think that replacing the 10-22 with a f/4.5 - f/5.6 lens is in the mill. That's a low cost entry level aperture range.

 

[moreorless]

It is POSSIBLE that it could be a replacement for the long-in-the-tooth EF-S 10-22 USM... afterall, the 10-18 is quite new and quite cheap.

True, but as far as speed, nothing differentiates this patent from the current 10-22. In fact, it's slower!
I guess for UWA fun, I'll have to get a full frame with the 16-35 f4.

Is speed really a key issue for UWA's on APSC though? that nobody but Tokina have ever made a fast UWA zoom for APSC does seem to suggest its a niche market.

9mm obviously offers a notable advantage over 10mm and means Canon edge out Nikons 15mm equivalent on there 10-24mm with 1.5 crop factor with 14.5mm.

If the 80D really pushes resolution then an update to the 10-22mm does seem to be needed badly.

 

[Maximilian]

It is POSSIBLE that it could be a replacement for the long-in-the-tooth EF-S 10-22 USM... afterall, the 10-18 is quite new and quite cheap.

True, but as far as speed, nothing differentiates this patent from the current 10-22. In fact, it's slower!
I guess for UWA fun, I'll have to get a full frame with the 16-35 f4.

Is speed really a key issue for UWA's on APSC though? that nobody but Tokina have ever made a fast UWA zoom for APSC does seem to suggest its a niche market.

9mm obviously offers a notable advantage over 10mm and means Canon edge out Nikons 15mm equivalent on there 10-24mm with 1.5 crop factor with 14.5mm.

If the 80D really pushes resolution then an update to the 10-22mm does seem to be needed badly.

Your thoughts are mostly right but the EF-S 10-22mm f/3.5-4.5 USM with its aperture starting at 3.5 set the standard.
A lot of people use UWA not only for landscape, where wide aperture is less important. They use it for indors, for nights, for artsy UWA with low DOF and in addition they want the convenience of a zoom. Those want a wider aperture than 4.5.

And even if the 10-22 it has problems with a higher resolution 80D I don't believe, that those people are willing to trade of one whole number in aperture for losing 1 mm on the wide and 2 mm on the long end, too.

They (I) would say: "Canon, make the 10-22 better! give us the 9 mm in addition on the wide end, if possible. If not, leave it at 10 mm."

But we'll see what Canon thinks...