Patent: Canon 50mm f/3.5 IS Macro for Full Frame Mirrorless

[Canon Rumors]

A patent for a 50mm f/3.5 IS Macro lens for a full frame mirrorless camera has appeared.</p>
<p>Patent Publication No. 2015-215494 (Google Translated)</p>
<ul>
<li>Published 2015.12.3</li>
<li>Filing date 2014.5.12</li>
<li>Focal length 48.58</li>
<li>F-number 3.50</li>
<li>Half angle (in degrees) 24.01</li>
<li>Image height 21.64</li>
<li>Overall length of the lens 85.71</li>
<li>BF 27.79</li>
</ul>
<p>The machine translation shows EF mount, but I’m not sure if that’s an accurate translation. If anyone can translated this better than Google can, <a href="http://www.canonrumors.com/contact-form/">please drop us a line</a>.</p>

 

[mkabi]

Huh???

We all know that all patents don't go to production.

So... I'm thinking with the rumor that Nikon's Samsung NX Tech.
Acquisition, Canon marketing put this out there to bring/keep customers.

 

[Random Orbits]

Huh???

We all know that all patents don't go to production.

So... I'm thinking with the rumor that Nikon's Samsung NX Tech.
Acquisition, Canon marketing put this out there to bring/keep customers.

Except it was filed 1.5 years ago...

 

[douglaurent]

If Canon was clever, they keep the form factor of their DSLRs and the EF mount, and come up with mirrorless concepts. Nobody needs new mounts and smaller sensors.

 

[tyger11]

If Canon was clever, they keep the form factor of their DSLRs and the EF mount, and come up with mirrorless concepts. Nobody needs new mounts and smaller sensors.

There's always the idea of making a mirrorless camera that has a built-in focal reducer, thus keeping compatability with all their lenses, and making them all wider/faster at the same time.

 

[eosuser1234]

Does not mention anything about the EF mount by Canon. The original post in Japanese just was speculating if it will be an EF mount, with the thought that it would as Canon EF mount continues to go on strong within the cinema line.

 

[privatebydesign]

Does not mention anything about the EF mount by Canon. The original post in Japanese just was speculating if it will be an EF mount, with the thought that it would as Canon EF mount continues to go on strong within the cinema line.

It cannot be an EF or EF-S mount lens with a BF of 27.79mm. It could be EF-M, BF is normally measured from the rearmost lens of the design not the mount flange, so anything 16 ish mm and over (EF-M flange distance is 18mm) will be EF-M. EF requires a minimum of 42 ish mm on the 44mm flange distance.

 

[9VIII]

Does not mention anything about the EF mount by Canon. The original post in Japanese just was speculating if it will be an EF mount, with the thought that it would as Canon EF mount continues to go on strong within the cinema line.

It cannot be an EF or EF-S mount lens with a BF of 27.79mm. It could be EF-M, BF is normally measured from the rearmost lens of the design not the mount flange, so anything 16 ish mm and over (EF-M flange distance is 18mm) will be EF-M. EF requires a minimum of 42 ish mm on the 44mm flange distance.

Without the mirror mechanism there's plenty of space inside the mount for recessed lens elements.
Canon does have the largest full frame mount by a wide margin.

They "might" want to move the electronic contacts, but full native EF compatibility would be the ideal for me, and I assume millions of other existing Canon users.

 

[Maximilian]

Interesting!

BF 27.79 is pointing towards mirrorless, so could be an EF-M macro as mentioned here http://www.canonrumors.com/forum/index.php?topic=28243.msg556966#msg556966

Image height of 21.64 is delivering an image circle for FF.

Maybe the first hint, that Canon is already seriously pursuing mirrorless FF since the filing date is also one and a half year ago (2014.5.12, hope that I didn't get month and day wrong), whatever mount it'll get.
Maybe just a dead end patent... :-\

 

[Antono Refa]

Canon is working on a FF mirrorless camera, and the first lens design ready to go out to the patent office is a 50mm f/3.5 macro lens?!

 

[ajfotofilmagem]

It could be a compact camera design with integrated lens.

Something like the Sony RX1, but that truly fits in your pocket.

 

[Wizardly]

https://goo.gl/DCXxJ7

There are 3 examples to this patent. None of them have an image height larger than 24mm. Example 3 is only 21.6 mm

On the other hand, example 1 is much more plausible. This looks more like an attempt at a 30mm lens for EF-M OR a lens to fit on a 1.5-inch type sensor. Back focus of 18.44 (EF-M is 18 mm). Focal length is 31mm (30 mm nominal). f/3.5 aperture. Image height is 13.66 mm (APS-C on Canon is 14.9 mm, G1X sensor is 14mm). Length is 55mm.

 

[privatebydesign]

Does not mention anything about the EF mount by Canon. The original post in Japanese just was speculating if it will be an EF mount, with the thought that it would as Canon EF mount continues to go on strong within the cinema line.

It cannot be an EF or EF-S mount lens with a BF of 27.79mm. It could be EF-M, BF is normally measured from the rearmost lens of the design not the mount flange, so anything 16 ish mm and over (EF-M flange distance is 18mm) will be EF-M. EF requires a minimum of 42 ish mm on the 44mm flange distance.

Without the mirror mechanism there's plenty of space inside the mount for recessed lens elements.
Canon does have the largest full frame mount by a wide margin.

They "might" want to move the electronic contacts, but full native EF compatibility would be the ideal for me, and I assume millions of other existing Canon users.

That wasn't the point, the point was it can't be EF, the BF distance precludes it. I was pointing that fact out.

 

[mdomask]

Except it was filed 1.5 years ago...

This is standard for patents. The date on which you file the patent application is often long before the patenting authority publishes the filed application.

 

[StudentOfLight]

https://goo.gl/DCXxJ7

There are 3 examples to this patent. None of them have an image height larger than 24mm. Example 3 is only 21.6 mm

On the other hand, example 1 is much more plausible. This looks more like an attempt at a 30mm lens for EF-M OR a lens to fit on a 1.5-inch type sensor. Back focus of 18.44 (EF-M is 18 mm). Focal length is 31mm (30 mm nominal). f/3.5 aperture. Image height is 13.66 mm (APS-C on Canon is 14.9 mm, G1X sensor is 14mm). Length is 55mm.

I'm not sure I follow. 21.6mm is full frame.

 

[Mitch.Conner]

Except it was filed 1.5 years ago...

This is standard for patents. The date on which you file the patent application is often long before the patenting authority publishes the filed application.

Wait... you mean to tell me that you can't file a patent application, have it assigned to an art unit and patent examiner, have it reviewed, communicate between the patent drafter and the examiner, and eventually/hopefully have it published ALL IN THE SAME DAY!?!?

What has this world come to?

 

[Proscribo]

It could be a compact camera design with integrated lens.

Something like the Sony RX1, but that truly fits in your pocket.

Why the obsession with FF sensors, you'd get pretty much same performace out of MFT with 25mm/1.7 lens than what you'll get with FF and 50mm/3.5 lens for example.

E: for MILC a really small 50mm could maybe make sense.

 

[ccapan]

It is of course the new 30 MP sensor for the 5Dm 8)

 

[privatebydesign]

https://goo.gl/DCXxJ7

There are 3 examples to this patent. None of them have an image height larger than 24mm. Example 3 is only 21.6 mm

On the other hand, example 1 is much more plausible. This looks more like an attempt at a 30mm lens for EF-M OR a lens to fit on a 1.5-inch type sensor. Back focus of 18.44 (EF-M is 18 mm). Focal length is 31mm (30 mm nominal). f/3.5 aperture. Image height is 13.66 mm (APS-C on Canon is 14.9 mm, G1X sensor is 14mm). Length is 55mm.

I'm not sure I follow. 21.6mm is full frame.

No it isn't, 24mm is. 135 format is 36mm x 24mm.

 

[Loswr]

So... I'm thinking with the rumor that Nikon's Samsung NX Tech.
Acquisition, Canon marketing put this out there to bring/keep customers.

Except it was filed 1.5 years ago...

This is standard for patents. The date on which you file the patent application is often long before the patenting authority publishes the filed application.

Of course. The point was in response to the suggestion that this patent publication represents a response of some sort to the recent news of Nikon buying Samsung tech, which clearly it does not (or maybe Canon has some really prescient soothsayers, who knows?).