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Archive 2012 · 5d mkii Vertical Banding repair or not?
  
 
psidawd
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p.1 #1 · p.1 #1 · 5d mkii Vertical Banding repair or not?


Im borrowing a friend's 5d mkii and noticed that at 100% zoom you can definitely see vertical lines.

Ive called the local repair places and canon and inquired about it and they say that it will either need a new sensor which would cost around $800-$1200 or a couple hundred dollars to fix.

Is it worth repairing this? The vertical lines are very faint and is only visible at 100% zoom. For those who had this issue before, did you get it fixed? or just live with it?

Ived own several 5d mkii and this is the only one that has it.



Aug 06, 2012 at 04:30 PM
Monito
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p.1 #2 · p.1 #2 · 5d mkii Vertical Banding repair or not?


Care to post an overview and a 100% crop, both at 720 px wide?



Aug 06, 2012 at 04:38 PM
psidawd
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p.1 #3 · p.1 #3 · 5d mkii Vertical Banding repair or not?







Aug 06, 2012 at 05:03 PM
ronno
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p.1 #4 · p.1 #4 · 5d mkii Vertical Banding repair or not?


is that a 200 or 300 percent zoom?


Aug 06, 2012 at 05:06 PM
psidawd
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p.1 #5 · p.1 #5 · 5d mkii Vertical Banding repair or not?


I just cropped it. I am unsure how to export at 100% zoom with LR3


Aug 06, 2012 at 05:11 PM
Monito
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p.1 #6 · p.1 #6 · 5d mkii Vertical Banding repair or not?


Thanks! Pictures make diagnosing so much more meaningful.

That is a JPEG compressed at level 6.

Are you shooting JPEG in the camera and not Raw? It seems a bit over-sharpened. Perhaps the sharpening is higher than your previous Mark II.



Aug 06, 2012 at 05:30 PM
psidawd
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p.1 #7 · p.1 #7 · 5d mkii Vertical Banding repair or not?


I shoot RAW like I always do. Also same processing as before

I did notice that if I turn the sharpening down its not as bad.

Here's a sample of my other 5dmkii with no vertical lines.






Aug 06, 2012 at 05:37 PM
Monito
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p.1 #8 · p.1 #8 · 5d mkii Vertical Banding repair or not?


It looks like you posted a 100% crop of the first surfer (good). If I look at it at 200% I can see the vertical lines but they seem to be compression artifacts from the 8x8 JPEG blocks, due to the low level of quality in the JPEG saving.

When you see the vertical lines, are you viewing the Raw in your converter before saving the converted image or are you looking at a JPEG you saved and have opened to look at? Try saving at high quality (11 out of 12, or 12 out of 12 in Photoshop, or 95 % to 100% quality index).



Aug 06, 2012 at 05:42 PM
psidawd
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p.1 #9 · p.1 #9 · 5d mkii Vertical Banding repair or not?


Im sorry that go too technical for me.

Ill try this later.

I was just comparing some files from 5dmkii A ( vetical lines ) and 5d mkii B (no lines)
Same processing, same viewing and all edited, and exported with LR3

I guess my next question is. Would this kind of vertical banding considered terrible to the point that this camera needs to be repaired or save the money and stop pixel peeping?




Aug 06, 2012 at 05:50 PM
Monito
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p.1 #10 · p.1 #10 · 5d mkii Vertical Banding repair or not?


No repair necessary. It seems that the user processing (conversion) or post-processing is in error. They are definitely not given the same treatment (see the difference in sharpening), and the compression at level 6 is crushing the images.

I put them side by side enlarged at 400% (with nearest neighbour to preserve pixels):







You can clearly see how there is a JPEG compression pattern and sharpening halo in the first one and not the second one. Something different is happening in the workflow.



Aug 06, 2012 at 05:59 PM
 

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bigbluebear
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p.1 #11 · p.1 #11 · 5d mkii Vertical Banding repair or not?


the two samples do not look to be zoomed in the same amt


Aug 06, 2012 at 06:01 PM
bigbluebear
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p.1 #12 · p.1 #12 · 5d mkii Vertical Banding repair or not?


Monito wrote:
You can clearly see how there is a JPEG compression pattern and sharpening halo in the first one and not the second one. Something different is happening in the workflow.


Nice analysis.



Aug 06, 2012 at 06:02 PM
psidawd
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p.1 #13 · p.1 #13 · 5d mkii Vertical Banding repair or not?


Thanks for the analysis Monito

ok lets try this again.

I took photo 2 and synced it with the same settings of photo via lr3





If I zoom all they way in with both photos. I can still see very faint vertical lines.

At this point I feel that Im over analysis both cameras. Ive never had 2 of the same camera except the 5d mkii. Is it possible that these cameras are rendering different artifacts? if so It looks like I might have to pick one and just move on.

I do not use photoshop much and if I have to result in using it other than LR3 then that adds to my workflow which is not I am looking for.

again this is all pixel peeping. I think the next question would is how this affect the images in final presentation.




Aug 06, 2012 at 07:46 PM
skibum5
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p.1 #14 · p.1 #14 · 5d mkii Vertical Banding repair or not?


that looks pretty bad, looks like 7D banding only super bad even for that

unless that was under by 4 stops and lifted i think something has gone wrong or he got one of the rare 5D2 that were known to have come mangled straight from Canon new in box since some were damaged like that out of box and had strong vertical gain banding and mazing artifacts

Edited on Aug 07, 2012 at 12:49 AM · View previous versions



Aug 07, 2012 at 12:46 AM
skibum5
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p.1 #15 · p.1 #15 · 5d mkii Vertical Banding repair or not?


post 100% crop of the first one again but saved at jpg level 12 max.



Aug 07, 2012 at 12:48 AM
ronno
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p.1 #16 · p.1 #16 · 5d mkii Vertical Banding repair or not?


Just post the RAW files and you can get some real help here...there would be less confusion as to what has been done to the files. ;-)


Aug 07, 2012 at 02:23 AM
psidawd
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p.1 #17 · p.1 #17 · 5d mkii Vertical Banding repair or not?


Apologies for the ignorance but where can I upload the raw file?



Aug 07, 2012 at 03:47 AM
mttran
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p.1 #18 · p.1 #18 · 5d mkii Vertical Banding repair or not?


skibum5 wrote:
that looks pretty bad, looks like 7D banding only super bad even for that

unless that was under by 4 stops and lifted i think something has gone wrong or he got one of the rare 5D2 that were known to have come mangled straight from Canon new in box since some were damaged like that out of box and had strong vertical gain banding and mazing artifacts


+1



Aug 07, 2012 at 03:50 AM
surf monkey
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p.1 #19 · p.1 #19 · 5d mkii Vertical Banding repair or not?


I had exactly the same "cross type" banding on my 5D2 after I had sent it in for another issue. Canon Service did something to it, so I returned to be fixed. This was in 2010.
They fixed the issue and I haven't had a problem since.

On the service notes, they said "Adjusted the CMOS." Also, "...upon close inspection the exact cause could not be identified but it was found that noise appeared in the image. Electrical adjustments were carried out on the cmos assembly"

You can see the original post from 2010 showing my issues here: http://www.fredmiranda.com/forum/topic/871023/0#8168766




Aug 07, 2012 at 04:27 AM
psidawd
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p.1 #20 · p.1 #20 · 5d mkii Vertical Banding repair or not?


Thanks Surf monkey. I think ill just send it in and hope for the best.


Aug 07, 2012 at 04:32 AM
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