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Patent to automate the Canon AF adjustment
  
 
Fred Miranda
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p.1 #1 · p.1 #1 · Patent to automate the Canon AF adjustment


Patent to automate the Canon AF adjustment
The Egami blog posted a new Canon patent to automate the Canon AF adjustment. Let's hope this new feature shows up in a upcoming Canon DSLR.

Description and self-interpretation of the patent literature:

Patent Publication No. 2013-254194
  1. Publication date 2013.12.19
  2. Filing date 2012.5.11

Issues surrounding the AF adjustment
  1. The looseness of the phase difference AF sensor, because the AF accuracy is worse, need AF adjustment
  2. It is not done correctly the AF adjustment in your environment
  3. Necessary facilities such as service center

Canon patents
  1. Automation of the AF adjustment
  2. Procedure
    Let me be the difference adjusted value of the phase difference AF and contrast AF
    To determine the reliability.



Jan 13, 2014 at 03:03 PM
jaybird555
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p.1 #2 · p.1 #2 · Patent to automate the Canon AF adjustment


Very interesting.Thanks for the info.


Jan 13, 2014 at 03:28 PM
Schlotkins
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p.1 #3 · p.1 #3 · Patent to automate the Canon AF adjustment


Wasn't this similar to something suggested here? i.e. focus using live view and then micro adjust until both AFs match?

Chris



Jan 13, 2014 at 05:55 PM
ahender
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p.1 #4 · p.1 #4 · Patent to automate the Canon AF adjustment


There is the Dot Tune method. I believe it is included in Magic Lantern as an automatic process.


Jan 13, 2014 at 06:31 PM
Andrew J
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p.1 #5 · p.1 #5 · Patent to automate the Canon AF adjustment


Canon will give this to us but not before Nikon does.


Jan 14, 2014 at 05:44 PM
snapsy
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p.1 #6 · p.1 #6 · Patent to automate the Canon AF adjustment


Here is the english version of the patent:

Patent PDF (English)



Jan 14, 2014 at 05:48 PM
EB-1
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p.1 #7 · p.1 #7 · Patent to automate the Canon AF adjustment


It's about time! Perhaps those new dual pixels can be put to some use for still photography after all.

EBH



Jan 19, 2014 at 02:24 AM
EB-1
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p.1 #8 · p.1 #8 · Patent to automate the Canon AF adjustment


Andrew J wrote:
Canon will give this to us but not before Nikon does.


Why? Does Nikon have a similar patent?

EBH



Jan 19, 2014 at 02:31 AM
 

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johnctharp
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p.1 #9 · p.1 #9 · Patent to automate the Canon AF adjustment


EB-1 wrote:
It's about time! Perhaps those new dual pixels can be put to some use for still photography after all.

EBH


If the 70D is any indication, DPAF may be a revolution for a number of types of photography. Shooting portraiture with wide-aperture lenses wide open, at least in decent light, stands out at the top of the list; especially for a DPAF-equipped full-frame camera.




Jan 19, 2014 at 02:39 AM
snapsy
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p.1 #10 · p.1 #10 · Patent to automate the Canon AF adjustment


johnctharp wrote:
If the 70D is any indication, DPAF may be a revolution for a number of types of photography. Shooting portraiture with wide-aperture lenses wide open, at least in decent light, stands out at the top of the list; especially for a DPAF-equipped full-frame camera.



For sure the endgame is sensor-based AF and Canon has great technology with the 70D. Nikon's hybrid approach on the Nikon 1 works well too but I'm not sure how well that will scale vs the 70D's implementation.



Jan 19, 2014 at 02:42 AM
Andrew J
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p.1 #11 · p.1 #11 · Patent to automate the Canon AF adjustment


EB-1 wrote:
Why? Does Nikon have a similar patent?

EBH


No, because we didn't get live-view or UDMA card slots until Nikon had them.



Jan 19, 2014 at 03:05 AM
EB-1
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p.1 #12 · p.1 #12 · Patent to automate the Canon AF adjustment


Andrew J wrote:
Canon will give this to us but not before Nikon does.

EB-1 wrote:
Why? Does Nikon have a similar patent?

EBH

Andrew J wrote:
No, because we didn't get live-view or UDMA card slots until Nikon had them.


How are those relevant to AF? Nikon has had many firsts in SLRs, but so have Canon, Olympus, Minolta, Pentax, etc. Canon has been particularly a leader in the area of AF.

EBH



Jan 19, 2014 at 04:39 AM
Paul Mo
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p.1 #13 · p.1 #13 · Patent to automate the Canon AF adjustment


I wish they'd patent an Ezy-Kleen viewfinder.


Jan 20, 2014 at 05:41 AM
MintMar
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p.1 #14 · p.1 #14 · Patent to automate the Canon AF adjustment


EB-1 wrote:
How are those relevant to AF? Nikon has had many firsts in SLRs, but so have Canon, Olympus, Minolta, Pentax, etc. Canon has been particularly a leader in the area of AF.

EBH


But they were also leaders of tight market segmentation by AF, and it was thanks to Nikon (D300, D700) that Canon's non-1D bodies got finally better AF than 9pt retro-2000 one. Therefore it's not unreasonable for some to expect Nikon to make the first move, it seems.



Jan 20, 2014 at 08:03 AM
Larate
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p.1 #15 · p.1 #15 · Patent to automate the Canon AF adjustment


It is said Canon already have a product name for that. They would name it .Tune (read dot tune)!
:')



Jan 20, 2014 at 10:28 AM





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