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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 23 Oct 2009 (Friday) 19:38
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7D Ghost Images

 
tetrode
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Oct 27, 2009 12:09 |  #31

Curious that Canon states that the issue will be addressed by a firmware update. Have they been aware of this problem for some time and already determined that it is not hardware related? To a non-engineer such as myself, it certainly appears more like an image latency issue than a software issue. Of course, if the problem is tied to the speed with which the sensor can be fully cleared of a prior image, the firmware "fix" might involve throttling back the maximum available frame rate based on selected shooting parameters. I'm sure Canon doesn't even want to think about a recall. Let's hope the ghosts really can be exorcised through a firmware update.

It will be interesting to see how this story evolves.

Dave F.




  
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Mr. ­ Clean
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Oct 27, 2009 12:19 |  #32

heh

Throttle back the FPS :D


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Hogster86
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Oct 27, 2009 12:28 |  #33

7D Service Note from Canon - "Residual Image in Picture" - Firmware update imminent

http://www.usa.canon.c​om …356&keycode=211​2&id=60427 (external link)

FYI all ...

Cheers :)

David

PS. Never had this problem myself, but they've obviously admitted it's a possible problem.


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FL ­ PHOTO
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Oct 27, 2009 12:35 as a reply to  @ Hogster86's post |  #34

Good to see them acknowledge the problem and jump on it quickly. Granted the camera never should have had the issue in the first place but their quick action is commendable.


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nicksan
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Oct 27, 2009 12:38 as a reply to  @ Hogster86's post |  #35

https://photography-on-the.net/forum/showthre​ad.php?t=771433




  
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cbfabbri
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Oct 27, 2009 12:44 |  #36

tetrode wrote in post #8904256 (external link)
Curious that Canon states that the issue will be addressed by a firmware update. Have they been aware of this problem for some time and already determined that it is not hardware related? To a non-engineer such as myself, it certainly appears more like an image latency issue than a software issue. Of course, if the problem is tied to the speed with which the sensor can be fully cleared of a prior image, the firmware "fix" might involve throttling back the maximum available frame rate based on selected shooting parameters. I'm sure Canon doesn't even want to think about a recall. Let's hope the ghosts really can be exorcised through a firmware update.

It will be interesting to see how this story evolves.

Dave F.



I was thinking the same think.
I "must" believe it's something a firmware can fix.


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mrkgoo
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Oct 27, 2009 12:45 as a reply to  @ Hogster86's post |  #37

Getting the word out there that they know about it is important. I know it's a toss-up between keeping mum so the camera doesn't have bad word of mouth (and having people hold off on getting it, thus affecting impressions), but I like the approach of acknowledging the problem and proposing a fix.




  
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cbfabbri
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Oct 27, 2009 12:46 as a reply to  @ Hogster86's post |  #38

Let's believe it's just about a firmware update.
I really want to believe on that.

Just cancelled my BH order. I am too far away for a return/recall if needed.

Let's wait to see if it's just about a firmware fix, if ok, I'll get one near future.


Sorry guys, but it's a shame. :-(


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TeamSpeed
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Oct 27, 2009 13:10 |  #39

It most likely is in the algorithm that takes the sensor readings and creates the raw data from that reading. In a burst mode, it may be possible that memory buffers are not initialized and data is XOR'd with the preceding data in that buffer, and you get residual ghost data left over in memory. Not sure, but this is a guess. I definitely don't see this as a hardware/sensor issue and is rather a memory mapping exercise.


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Nervous
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Oct 27, 2009 13:19 |  #40

Canon always has problems like this with new cameras. Remember 5DII and "black dots" phenomena? 50D and magenta colors? It will be good if it is fixable via firmware update. But could be more serious issue, like AF in 1DIII.... Hopefully, this is not the issue this time.


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egordon99
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Oct 27, 2009 13:28 |  #41

TeamSpeed wrote in post #8904616 (external link)
It most likely is in the algorithm that takes the sensor readings and creates the raw data from that reading. In a burst mode, it may be possible that memory buffers are not initialized and data is XOR'd with the preceding data in that buffer, and you get residual ghost data left over in memory. Not sure, but this is a guess. I definitely don't see this as a hardware/sensor issue and is rather a memory mapping exercise.

They should have used Java....No memory management needed for the user (unlike that nasty language called C :lol:)




  
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Nick_b
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Oct 27, 2009 13:29 |  #42

Don't you people understand what is happening here? The 7D is a time machine! imagine what the future holds! we may one day be able to take pictures of Jesus...


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SlvrScoobie
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Oct 27, 2009 13:31 as a reply to  @ Hogster86's post |  #43

sounds like the "bucket brigade" isnt fully dumping the electrons from the pixels
or the empty register isnt doing its job well enough...
ahhh cmos technology, wish i could get a job doing this stuff, im just not a EE guy lol




  
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e02937
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Oct 27, 2009 13:35 as a reply to  @ Hogster86's post |  #44

I've still only seen once example of this occurring in a shot on the web. It was a picture of an eagle and if you looked you could make out the ghosting on the underside of the wing IIRC. And that's with a month of the camera being out and everyone on DPR trying to beat the camera to death.


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Ylwstone
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Oct 27, 2009 13:35 |  #45

egordon99 wrote in post #8904243 (external link)
Kudos to Canon for coming out and admitting they have a problem.

This to me is the really good news.
Hopefully the attitude I perceived of arrogance, not listening and not
admitting things could be improved is gone.
Sounds like they see they have an issue and are letting us know they are working on it.
A change. :cool:


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7D Ghost Images
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