Patent: Canon XC Style Camera With Interchangeable Lenses

Canon Rumors Guy

EOS 1D MK II
Jul 20, 2010
7,530
286
Canada
www.canonrumors.com
HTML:
We <a href="http://www.canonrumors.com/new-type-of-camera-coming-from-canon-ahead-of-photokina-cr1/">reported a while back that Canon was working on a new style of ILC camera</a>, and the XC line seemed like an obvious place to look at first. Now we have a patent that shows an ILC XC style camera. It looks like the patent is about a lens converter, but I don’t speak patent all that well.</p>
<p><strong>Abstract:</strong></p>
<blockquote><p>An image pickup apparatus capable of preventing burning of an image pickup element by a light flux through an optical system provided between an interchangeable lens and an image pickup element even when an interchangeable lens is detached from a camera body.

An image pickup device for photoelectrically converting a light flux having passed through an interchangeable lens, a converter provided between the lens mount unit and the image pickup device, An image pickup apparatus 1 including a lens 102 is provided. The converter lens 102 moves to the first position where the light flux from the converter lens 102 does not form an image on the image pickup element in conjunction with the operation of detaching the interchangeable lens 2 from the lens mount portion 101. <a href="https://www.j-platpat.inpit.go.jp/web/PU/JPA_H30112698/TKBS_GM302_Detailed.action">Read More…</a></p></blockquote>
<p>We have heard multiple times about a new style of camera, and<a href="http://www.canonrumors.com/a-new-style-of-camera-from-canon-currently-being-tested-cr2/"> back in January we got a description of one</a>, which doesn’t match what we see here.</p>
<p> </p>

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LDS

EOR R
Sep 14, 2012
1,515
121
As far as I can understand, it's a lens inside the "converter" that automatically moves when a lens is attached/removed (to prevent "burning"?).

Maybe some sort of converter makes sense in an XC camera if EF lenses are going to be mounted on a 1" sensor and due to the flange distance?
 

Kit.

EOS 6D MK II
Apr 25, 2011
999
466
Could be a focal length reducer adapter to use larger-format lenses on smaller-format bodies at closer to their native focal lengths. Anti-teleconverter kind.
 

transpo1

EOS 7D MK II
Jan 12, 2011
723
74
Sounds like a better version of a Metabones Speedbooster to me. Maybe this is Canon's solution for FF 4K- keep the crop sensor but provide a speedbooster to convert to FF and use EF glass natively.
 

Canoneer

EOS T7i
Sep 6, 2017
73
3
transpo1 said:
Sounds like a better version of a Metabones Speedbooster to me. Maybe this is Canon's solution for FF 4K- keep the crop sensor but provide a speedbooster to convert to FF and use EF glass natively.
That would be awesome, but I just don't think it's possible to design a focal reducer that can shrink a FF image circle (43.3mm) to a 1" image circle (16mm) and still retain decent resolution and contrast. There would have to be significant crop - maybe a x0.71 reducer at the most.
 

transpo1

EOS 7D MK II
Jan 12, 2011
723
74
Canoneer said:
transpo1 said:
Sounds like a better version of a Metabones Speedbooster to me. Maybe this is Canon's solution for FF 4K- keep the crop sensor but provide a speedbooster to convert to FF and use EF glass natively.
That would be awesome, but I just don't think it's possible to design a focal reducer that can shrink a FF image circle (43.3mm) to a 1" image circle (16mm) and still retain decent resolution and contrast. There would have to be significant crop - maybe a x0.71 reducer at the most.
Yeah, that makes sense- I wouldn't be surprised if they're just going for Super 35mm crop from 1"

Anyone read far enough to know if the patent details sensor size? My hope would be that they would put an APS-C or Super 35mm sensor into this which would then enable a speed booster to achieve FF.
 

RGF

How you relate to the issue, is the issue.
Jul 13, 2012
2,816
35
Not sure why Canon is developing this camera. Would be nice to see Canon's vision of the future laid out.
 

tiggy@mac.com

Pentax K-1000
Jan 20, 2014
476
149
Thetford, VT
www.ForestMetrix.com
Did anyone notice that VERY strange mount on the camera-side of this converter? Like nothing I've ever seen. One the outer side you see the standard EF mount. On the other side, quite a narrowed opening, and some very strange mounting hardware posts. I don't know if this is THE new mount we've been anticipating, but it looks to be a new mount, and one that is different in more ways than simply the opening diameter.

As for the patent, which has nothing to do with the mount, I can't begin to guess what they mean by "burning" and "pick up." This strikes me as a sloppy translation issue?
 

padam

EOS 7D MK II
Aug 26, 2015
541
191
Yes, it is the new hybrid mount accepting both EF and EF-M style lenses using the switch on the side.
 

KeithBreazeal

EOS 6D MK II
Jan 16, 2014
1,253
22
www.kbvp.com
From what I see, it changes the flange to focal plane distance. Maybe the description is intentionally different than what the actual process is meant for. Universal lens mount?
 

LDS

EOR R
Sep 14, 2012
1,515
121
tiggy@mac.com said:
Did anyone notice that VERY strange mount on the camera-side of this converter? Like nothing I've ever seen. One the outer side you see the standard EF mount. On the other side, quite a narrowed opening, and some very strange mounting hardware posts. I don't know if this is THE new mount we've been anticipating, but it looks to be a new mount, and one that is different in more ways than simply the opening diameter.

As for the patent, which has nothing to do with the mount, I can't begin to guess what they mean by "burning" and "pick up." This strikes me as a sloppy translation issue?
I don't think it's a new mount. What you see is an exploded view of the mechanism, which IMHO will be fixed. My take is the converter lens may damage the sensor if a strong light is focused by the lens on it. So when the mounted lens is removed, it is moved to de-focus the converter and avoid damages.
 

Quackator

EOS RP
Jul 19, 2011
226
32
Hmmmm.... point a mirrorless at the sun without lens cap,
and see the trail of destruction burn across your sensor.....?

I might misunderstand this, but I think it is a protective mechanism.
 

cpreston

EOS T7i
Mar 22, 2014
83
25
Quackator said:
Hmmmm.... point a mirrorless at the sun without lens cap,
and see the trail of destruction burn across your sensor.....?

I might misunderstand this, but I think it is a protective mechanism.
I don't think you could damage a sensor with just the sun unless you pointed an extremely large telephoto lens at the sun. You could probably burn the sensor with an open focal length reducer, though. At least that is my guess.
 

HarryFilm

EOS RP
Jun 6, 2016
399
29
This specific mount prevents sunlight (or any other type of light!) from entering the main lens opening which can cause enough of a concentration of light rays to actually Burn-In the sensor itself (i.e. cause dead pixels) or actually MELT the sensor itself.

Light is a dangerous thing! Glass bottles, refracting ornamants, crystals, mirrors can ALL refract (i.e. concentrate) light rays to such an extent that you can start fires with mere light! Take a magnifying glass and concentrate the focal point on some paper or a piece of wood...see what happens? It starts burning!

In this case, a device moves a teleconverter elements such that it DIFFUSES the light (i.e. diffracts the light rays) when a lens is removed so that the light rays do not focus on the sensor plane thus preventing "Sensor Burn".

In terms of the OVERALL patent design, THIS camera is what is LIKELY to be introduced at either Photokina 2019 or at CES 2019 (January). It is a PROBABLY named the XC-15 Mk2 or the XC-20. It looks like it's the one inch sensor with an obvious interchangeable lens assembly.

Unfortunately, my sources specifically say this is NOT an APS-C or FF sensor -- it is definitely a one-inch sensor !

The XC-15-style I think is the IDEAL configuration for a higher end COMBINED
pro-level small-form-factor Stills and Video camera. It doesn't NEED to be a
Canon C700 FF Cinema camera ......BUT......this newer camera does need the 444/422 10-bit Intraframe and interframe video codecs. You can still put a 20 megapixel, 24 or even 30 megapixel IN a one-inch sensor format AND the stills and video output would look pretty decent. We'll see next month. My sources are 90% sure it's a one inch sensor camera in an XC-15-like form-factor that is coming EITHER at Photokina 2018 September OR at CES 2019.
 

tyger11

EOS M50
Mar 3, 2014
34
0
Canoneer said:
That would be awesome, but I just don't think it's possible to design a focal reducer that can shrink a FF image circle (43.3mm) to a 1" image circle (16mm) and still retain decent resolution and contrast. There would have to be significant crop - maybe a x0.71 reducer at the most.
I dunno about that. MetaBones made a special SpeedBooster for the original Blackmagic Pocket Cinema Camera which was 0.58x, and that camera was Super16. It was only Full HD, though.
 

tyger11

EOS M50
Mar 3, 2014
34
0
miketcool said:
Bring on the PL to EF mount! This would be another cinema game changer!
I don't see too many people using PL lenses with this class of camera. But anything is possible, I guess. You go with Canon cine cams for AF, generally.
 

tyger11

EOS M50
Mar 3, 2014
34
0
transpo1 said:
Anyone read far enough to know if the patent details sensor size? My hope would be that they would put an APS-C or Super 35mm sensor into this which would then enable a speed booster to achieve FF.
I remember reading about a Canon sensor patent that sounded nice, and it was for a 1.5" sensor. Combine that with an EF-M mount and possible adapter, and you might have something pretty nice, if they are willing to finally put DPAF and non-crippled 4K into a non-Cxxx line camera. If they put Blackmagic P4K ability into a camera with Canon's AF, they would have a major winner on their hands at a much higher price than the P4K.