Ghost in 7D.(frm Japan)

[gnosis_ignosis]

I'm not good at english,so pardon me my poor english writing.

In Japan,many images with ghost taken with 7D are uploaded on the web.
Those images are not fake,they really are taken with 7Ds.

Here is one.(See exif if u want further informations.)



Here is another image with ghost(s).(Caution!! Big images.)
(3rd frame image of 3 contiguous,
Ghosts of 2nd and 1st frame image exist.)
ttp: nullpoarchives.orz.hm/uploader/upload/File4624.jpg

(Plz add initial 'h' to link address because I don't want big image shown instantly.)

Resized and equalized.



2nd frame.
ttp: nullpoarchives.orz.hm/uploader/upload/File4625.jpg

1st frame.
ttp: nullpoarchives.orz.hm/uploader/upload/File4628.jpg

Ghost is more visible by PhotoShop's histgram equalization effect.
Some ghosts are visible without PhotoShop's effect.

Some people suppose that the ghost is generated by error on CMOS resetting.
(CMOS reset timing error,precision error,etc)
Conditions for ghost image is:
1. Shoot with maximum continuous shooting rate.(8.05fps)
2. Shoot with fast shutter speed.(> 1/500s ?)
3. Image's back ground is flat and bright.(Blue sky,etc)
4. Target is a fast moving object.(Bird,Jet fighter,etc)
5. 2nd or later frame image has a ghost of previous frame image.

Unfortunatery,FW ver1.0.9 doesn't resolve this problem, perhaps.
(An image with ghost taken with FW1.0.9-7D was already uploaded on the web.)

 

[Zeee]

This is your first post so no disrespect but I have a question about the bird. If the camera ghosted would the ghost image not be behind the bird in the direction of travel not off to the side?

These are at High Speed Continuos at 1/8000 AV. I looked at them at 100% at home and I don't see any ghosting.

http://forums.dpreview.com/forums/read.asp?forum=1019&message=33401308

--
I have made my decision. Don't confuse me with the facts.

 

[Nathan F]

That would only be true if the camera was on a tripod; hand tracking a fast moving bird is not exactly a very precise thing. Even so, the wind could cause a bird to move in such a manner easily.

This is your first post so no disrespect but I have a question about the bird. If the camera ghosted would the ghost image not be behind the bird in the direction of travel not off to the side?

These are at High Speed Continuos at 1/8000 AV. I looked at them at 100% at home and I don't see any ghosting.

http://forums.dpreview.com/forums/read.asp?forum=1019&message=33401308

--
I have made my decision. Don't confuse me with the facts.

 

[Zeee]

That makes sense. Even you are moving around. Thought I'd try because this will start a whole new crisis.

--
I have made my decision. Don't confuse me with the facts.

 

[harendra]

This is translated link. Click afterimage(google trans )

http://translate.google.com/translate?prev=hp&hl=en&js=y&u=http://bbs.kakaku.com/bbs/K0000055429/&sl=ja&tl=en&history_state0=&swap=1
The original japanese page is.
http://bbs.kakaku.com/bbs/K0000055429/
Hope they solve it quickly
--
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http://www.flickr.com/photos/divdude007/
======================================

 

[Aussie Rod]

...but it is the camera...

http://forums.dpreview.com/forums/read.asp?forum=1029&message=33347975

 

[Zeee]

I tried all types of Levels and curves and I can't see anything. This was at 1/8000.



--
I have made my decision. Don't confuse me with the facts.

 

[bstring]

I've captured 3,514 images with my 7D so far and I have seen this as well, once only. It was the same type of shot, dark bird against bright sky. I probably took 300 similar shots that day.

I went looking and I'm sure I dumped the shot, but find this thread interesting. It doesn't concern me a great deal really, considering the frequency. I'm sure it will get worked out.

--
Phanfare supporter- Photon for iPhone!

 

[Zeee]

I'll look out for that.

--
I have made my decision. Don't confuse me with the facts.

 

[Julio]

It was reported here in the Lens forum. The poster thought it might be a lens issue which is very unlikely--at least I can't imagine how a lens would cause that. His example is even better because you can see that the wing position is different indicating a retention of vestiges of the previous image by the sensor--not a shifted ghost of the same exposure.

http://forums.dpreview.com/forums/read.asp?forum=1029&message=33347975

--
http://fotoman99.smugmug.com/

 

[Zeee]

I did not see that thread. When I first read this and this was the posters first thread I started to wonder.

--
I have made my decision. Don't confuse me with the facts.

 

[silverpilot03]

LOL. With Halloween approaching, I was a bit apprehensive to click to expand the pictures. I was afraid I'd see apparitions of dead people in these photos. :O

 

[bronxbombers]

what if it was IS stuttering?

It was reported here in the Lens forum. The poster thought it might be a lens issue which is very unlikely--at least I can't imagine how a lens would cause that. His example is even better because you can see that the wing position is different indicating a retention of vestiges of the previous image by the sensor--not a shifted ghost of the same exposure.

http://forums.dpreview.com/forums/read.asp?forum=1029&message=33347975

--
http://fotoman99.smugmug.com/

 

[xxD]

This is translated link. Click afterimage(google trans )

http://translate.google.com/translate?prev=hp&hl=en&js=y&u=http://bbs.kakaku.com/bbs/K0000055429/&sl=ja&tl=en&history_state0=&swap=1

My favorite post on the translate site:

"Finally - I recall you, I or I - or farm are sesame "

The original japanese page is.
http://bbs.kakaku.com/bbs/K0000055429/
Hope they solve it quickly
--
======================================
http://www.flickr.com/photos/divdude007/
======================================

 

[bronxbombers]

This is translated link. Click afterimage(google trans )

http://translate.google.com/translate?prev=hp&hl=en&js=y&u=http://bbs.kakaku.com/bbs/K0000055429/&sl=ja&tl=en&history_state0=&swap=1

My favorite post on the translate site:

"Finally - I recall you, I or I - or farm are sesame "

don't forget!:

"It's rumored release of buckwheat as 10 percent. I would like give this a try."

"The eggs are taken and I want a wife with no sense of the camera."

 

[JohnKrist]

bronxbombers wrote:
I want a wife with no sense of the camera."

Now, that's something we all want!

--

If you spend 10 hours in rain photographing aircraft, you are plane crazy, like me!

7D+BG-E7(on it's way)50D+BG-E2n, old 18-55 kit lens, 70-200 2.8 L IS, Canon 1.4x II, Metz 58 AF-1

 

[ricleo]

same here!

for a moment i thought that the 7D was doubling up as a good paranormal investigation tool.

LOL. With Halloween approaching, I was a bit apprehensive to click to expand the pictures. I was afraid I'd see apparitions of dead people in these photos. :O

 

[KiKi2]

Could light be leaking onto the sensor from somewhere in the camera? Is "picture review" enabled? Which "review time"? Or were you shooting in Live View?
And does the ghost match the/a previous image in the sequence?
-k2

 

[Z_Ghost]

I can see it and it's a little strange that it can do this.



--
http://www.pbase.com/z_ghost

 

[ohyva]

I can see it and it's a little strange that it can do this.

Looks like a very weak double exposure where the 1st (or 2nd) image is exposed very shortly. The shadow / ghost is definitely not a clone of the main image as wings have different position.

Technical possibilities I can imagine.
Residual image in the sensor due to poorly done reset of the sensels.

Some residual old image data in the image processing pipe due to poor reset of some memory space(s).