Patent: EF-M 18-40 Pancake

Canon Rumors Guy

Canon EOS 40D
CR Pro
Jul 20, 2010
10,779
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www.canonrumors.com
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<p>A patent showing an EF-M 18-40  f/3.5-5.6 pancake has come to light. With this patent a bunch of other optical formulas also appear, such as an 18-55 pancake, 10-20, and a 9-18. We currently have an EF-M 11-22, which is probably rooted from the latter two optical formulas.</p>
<p>A zoom pancake would be a nice addition to the geographically fragmented and oddly marketed EOS M line.</p>
<ul>
<li><strong>Patent Publication No. 2014-6275</strong>
<ul>
<li><span>Publication date 2014.1.16</span></li>
<li><span>Filing date 2012.6.21</span></li>
</ul>
</li>
<li><strong>Example 7</strong>
<ul>
<li><span>Zoom ratio 3.00</span></li>
<li><span>Focal length f = 18.10-37.01-54.30mm</span></li>
<li><span>Fno. 4.20-6.20-8.20</span></li>
<li><span>Half angle ω = 36.92-20.17-14.06 °</span></li>
<li><span>Image height Y = 13.60mm</span></li>
<li><span>64.74-56.63-62.13mm lens length</span></li>
<li><span>BF 0.50mm</span></li>
</ul>
</li>
<li><strong>Canon patents</strong>
<ul>
<li><span>The possible vibration damping by the second lens group</span></li>
<li><span>Feeding whole, front focus, focusing, rear focusing, etc.</span></li>
</ul>
</li>
</ul>
<p>Source: [<a href="http://egami.blog.so-net.ne.jp/2014-01-20" target="_blank">EG</a>]</p>
<p><strong><span style="color: #ff0000;">c</span>r</strong></p>
 
Jan 29, 2011
10,675
6,121
Woody said:
Lee Jay said:
Another stupid lens that starts at 28mm instead of 24mm (equivalent).

How many kit lens (FF, APS-C or m43) starts at 24 mm? Maybe you can design and fabricate one to show the world how it's done?
Er, the 24-105 f4, probably the most ubiquitous ff kit lens ever made, oh, and it's "replacement" the 24-70 f4. And, of course, in a few markets the 24-70 f2.8 was/is a kit lens.
 
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Lee Jay

EOS 7D Mark II
Sep 22, 2011
2,250
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Woody said:
Lee Jay said:
Another stupid lens that starts at 28mm instead of 24mm (equivalent).

How many kit lens (FF, APS-C or m43) starts at 24 mm? Maybe you can design and fabricate one to show the world how it's done?

24-105. Many modern compacts including the little Elph 500HS in my pocket. My EFs 15-85 IS.
 
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this has got to be the most under supported mirrorless camera available. Samsung, Sony, Olympus, etc have 12,000 variations of every model and are constantly releasing new products to the market.
meanwhile, Canon has released one underspecced EOS-M body, and 3 lenses, one of which isn't available in America, even after being on the market for a long while.
While i'm not a fan of the brands releasing crap cameras with minor updates constantly(a la the 18mp rebel, 550D, 600D, 650D, 700D,) the current Canon strategy of releasing nothing ever is a little disconcerting for people like me who have bought in to this system.
I don't understand why they didn't release any new M bodies in 2013, especially for the holidays, and furthermore, why they still haven't released the 11-22 in the US(I thought they were waiting for a holiday 2013 release along with the M2, but that has passed.)
It's about time Canon releases some other products in to this line before I decide to cut my losses and sell my EOS-M while it is still the current model.
Pretty soon i'll be able to get a used Sony a7 to have as a second camera to my current baby, the Sony a7! I'm starting to see the current M as a red headed step child left out in the cold by an aloof and indifferent parent.
 
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Jul 20, 2010
1,163
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privatebydesign said:
Er, the 24-105 f4, probably the most ubiquitous ff kit lens ever made, oh, and it's "replacement" the 24-70 f4. And, of course, in a few markets the 24-70 f2.8 was/is a kit lens.

Actually, when I mentioned kit lenses, I was only thinking of something small,lightweight and cheap. Sorry, I did not make myself clear.

The 24-105 f/4 and 24-70 f/4 lenses are both L lenses and relatively big. In this respect, only the Nikon 24-85 f/3.5-4.5 for FF which weighs ~450g qualifies. The EF-S 15-85 IS lens is big and expensive for APS-C. For m43, the Panasonic 14-42 pancake zoom somewhat qualifies although it's not too cheap.
 
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dr croubie

Too many photos, too little time.
Jun 1, 2011
1,383
0
A 'pancake' lens that's 64mm long and (at least) 58mm wide is not really my definition of a pancake.
Also, a lens that is 64mm long at one end, 62mm at the other end, and 56mm long in the middle, that you have to somehow try to get to an intermediate focal length where it's smallest to pack away, is just a damn annoying lens.
 
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Ok. I'm going to ask this, knowing some eye rolling will occur. In what way will this be different than the 18-55? It's just going to be smaller? I know I'm not a photog expert here and I'm new (sort of) to this hobby, but...why? I must be missing something. Somebody much smarter/more experienced than me please enlighten me as to what I'm not interpreting from this.
 
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Bob Howland

CR Pro
Mar 25, 2012
917
588
Proffarm said:
Ok. I'm going to ask this, knowing some eye rolling will occur. In what way will this be different than the 18-55? It's just going to be smaller? I know I'm not a photog expert here and I'm new (sort of) to this hobby, but...why? I must be missing something. Somebody much smarter/more experienced than me please enlighten me as to what I'm not interpreting from this.
The distance between the back of the lens and the sensor can be MUCH less than for a DSLR lens, since there's no mirror to contend with. Presumably, this allows a different optical formal to be used, resulting in a smaller, maybe better lens. (That's the extent of my knowledge on the subject.)
 
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