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Archive 2011 · 7D highlight banding

  
 
Lance Couture
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p.5 #1 · 7D highlight banding


EverLearning wrote:
Geez Lance, talk about "gits and shiggles", your statement takes the cake!


First off, my reply to that was to Daan. I said I did see what he was seeing in his crops, but I tried in 4 different RAW converters to get it to behave the same way, with the same image, and I couldnt.

Based on the quote of mine you are commenting on, you have no way of knowing if read one article on LR3 or if I am the world's most knowledgeable non-owner of LR3.

Point being: you claimed that LR3 is no better than LR2 in NR, yet you do not own the products in question!!

Further to that, you are basing your claim on something you've READ rather than actually taken the time with to understand yourself in a hands-on fashion.

Plus, despite me explaining it a multitude of times now, you still don't get it. One, highlight banding has nothing to do with noise management.

I don't get it??

No, I get it. *Nowhere* did I say that this "banding" "issue", if you can even call it either one of those, was related to noise.

I was calling you out on your absolutely false assertion regarding LR2/3.

Canon has already admitted they missed adjusting one of two dials on the sensor the first time it was for service. They made the adjustment and the banding went away.

Great! It happens. All pieces of technology have their "phasma in machina".

Two, a 7D owner should not have to use any form of noise management at 800 ISO, nor apply it heavily at 1600 ISO. Even the best noise management software will result in some degree of loss of sharpness. Why even offer 12800 if 3200 isn't usable?

Wow. Where to even start.

I dont see a need to use NR at 800. I use barely a shade at 1600. 6400 ISO is entirely useable too.

If your post processing work flow does not extract what the camera is capable of - that's your problem, not the camera's.

8x10, 1600 ISO prints from this camera do not need NR. They really dont. If you, or anyone else, who believes that you need to apply NR "heavily" at 1600, then I dont know what to tell you, b/c that line of thinking truly is lost.

Three, Canon's correction of my banding and noise should not have thrown my WB way out of wack. And yes this too can be fixed with LR, but why should I have to adjust every picture? The WB was fine before their most recent adjustment.

Dunno? More importantly, and I'm not trying to be a jerk, I dont really care. I didnt address this issue. I only addressed your LR2/3 assertion.

This is a discussion of problems with the 7D. It is not a 'religious' war by Canon haters (I was thrilled with my 40D by the way) nor is it supposed to be an infomercial for LR3. And I truly am happy for those of you who are happy with your copy of the 7D, but it doesn't change the fact that some of us got bad copies.

My 30D was a great little camera. I had to send it in for 2 circuit boards to be replaced. I had to send in a battery grip for a board replacement too. I had to get my 70-200 calibrated b/c it looked like someone had wiped vaseline on the lens. My 5D needs the mirror fix, My 50/1.4 has been in, my 17-55 has been in, etc., etc., etc., etc..

There are bad copies of EVERYTHING out there.

It doesnt mean that every other copy is bad too. Threads like this seem to be looking for problems which arent even there, and moreover, the haters jump in non-stop telling people that <insert product here> is shite, b/c their copy was bad.

Hit up any automotive forum for cars with top-ranked reliability, and you will see so many threads about issues; its a wonder people would buy the car. The truth is that the majority of people are happy and have a well-performing product.

Daan is wondering about an issue that not all of us here can replicate, on a camera he hasnt even purchased. The fact that not everyone here can reproduce this issue lends me to think that this may not be an issue with the camera which took the pictures, but rather the conversion of the raw file.

Forums like this are a wealth of information, but more and more frequently, they are becoming poisonous. Too much information for people who are more concerned with the technical minutia than they are with the global aspect.

Its like a bunch of hypochondriacs seeing their doctor all the time b/c they think they have symptoms which fit something that they read on the Internet.



Mar 22, 2011 at 02:06 PM
keithreeder
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p.5 #2 · 7D highlight banding


EverLearning wrote:
When a camera offers 12800 ISO, one would certainly expect quite clean images at 1600 ISO. I don't think it is unreasonable to expect this or a completely clean image at 800 ISO.


1000 ISO:


1600 ISO:


2000 ISO:


6400 ISO:


12800 ISO:


If you can't do this with your 7D and a well-sorted workflow, the problem isn't with the camera (and as you can see from the Exif, those last two are in proper low light).





Mar 22, 2011 at 03:07 PM
Daan B
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p.5 #3 · 7D highlight banding


gdanmitchell wrote:
This sort of stuff is drives many of us crazy. Some individual poster announces, in tones that suggest that everyone already knows this, that he sees is some critical, terrible, awful, deal-killing problem with some camera that makes it unsuitable for real photographic work.


I have actually seen something. I have made an effort to actually post pics that exhibit the phenomenon. I asked if others have seen it too. To me it is a deal-breaker.

Rather than stating that such a thing exists - which is arguable at the minimum - it might be a bit more appropriate to post something along the lines of "I've heard rumors of banding in highlights on the 7D and I think I may see it in this example. Does anyone else see it? Any explanations?"

Aha, you are a language teacher. Thanks for the tips. If you ever care to learn some Dutch, you know where to find me

This sometimes makes we wonder about the motives of people who post these things.

To find some answers before I reach in my purse and buy something.



Mar 22, 2011 at 03:47 PM
Daan B
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p.5 #4 · 7D highlight banding


Lance Couture wrote:
I have taken a look at your crops, Daan, and do see what you are seeing the crops.


Lance, these aren't my crops. I don't own a 7D. The crops are from internet and from a fellow FM-er, who found out his 7D had a bad case of column fluctuations.


So, for gits and shiggles, I downloaded the RAW file expecting to see the same thing, and I can unequivocally say that this condition does NOT show up for me in:

1) DPP
2) LR 3.3
3) PS CS 5 (ACR 6.4, I think)
4) Capture One 5

... on my weekly-calibrated 27" monitor.

Perhaps this is something going on with your conversion software?


Hmmm, I used LR3.3 to convert. I also use a calibrated screen. How can it be that when we both use LR3.3 and a calibrated screen, the phenomenon is visible at my side and not at yours? Furthermore, how can it be that you see it in my posted crops but not in your own conversions? I don't have a special version of LR3.3. It works just fine...



Mar 22, 2011 at 03:53 PM
Lance Couture
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p.5 #5 · 7D highlight banding


Daan B wrote:
Hmmm, I used LR3.3 to convert. I also use a calibrated screen. How can it be that when we both use LR3.3 and a calibrated screen, the phenomenon is visible at my side and not at yours? Furthermore, how can it be that you see it in my posted crops but not in your own conversions? I don't have a special version of LR3.3. It works just fine...



I dont know.

That's what I'm trying to figure out...



Mar 22, 2011 at 06:29 PM
EverLearning
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p.5 #6 · 7D highlight banding


Lance, I'm not sure if you are doing this deliberately or not, so I will give you the benefit of the doubt. You have completely misread what I said. In no way did I claim that LR3 is no better than LR2 in NR. In fact, I thought my wording made it clear I had no reason to doubt what others are saying in that regard. But the point I was making is NR should be needed 3 and 4 stops below the top end of the camera. You say "If your post processing work flow does not extract what the camera is capable of - that's your problem, not the camera's." I am not talking about work flow; I am talking about the starting point - out of the camera. If one camera gives a clean image at 3200 and another gives a noisy image at 1600, I would rather shoot with the first one, thank you. NR softens the image, it's just a matter of how much. Why should I have to compromise at mid range ISO settings. So in THIS regard, it is a moot point how much better LR3 is to LR2.

Your next sentence just doesn't make any sense. If you have a good copy and I have a bad copy of the 7D, I am going to need NR where you don't. And since I have sold prints as large as 16x24, noise is important to me.

As for the rest of your diatribe, live is to short to even bother responding.

My FTP site is majorly screwed up, but I was able to use Microsoft Live Skydrive to load three photos for others to see. I will try to put them up here, but if it doesn't show well, it may be necessary to follow a link instead.

We'll start with the vertical banding:

http://cid-f204e264a77fecbc.photos.live.com/self.aspx/Samples/vertical%20banding%20crop%20iso%20500.jpg



Mar 22, 2011 at 09:23 PM
EverLearning
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p.5 #7 · 7D highlight banding


Hmm, it doesn't seem to like it. Here's the link:

http://cid-f204e264a77fecbc.photos.live.com/self.aspx/Samples/vertical%20banding%20crop%20iso%20500.jpg




Mar 22, 2011 at 09:26 PM
EverLearning
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p.5 #8 · 7D highlight banding


OK, I'm not having a good day! Has anybody posted pictures using Skydrive? If so, can you tell me what you did to post the picture? I can copy the link, open another Firefox tab, paste it in and get to the picture, so I know the picture is accessible.

Thanks!



Mar 22, 2011 at 09:28 PM
dwweiche
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p.5 #9 · 7D highlight banding


EverLearning wrote:
Lance, I'm not sure if you are doing this deliberately or not, so I will give you the benefit of the doubt. You have completely misread what I said. In no way did I claim that LR3 is no better than LR2 in NR. In fact, I thought my wording made it clear I had no reason to doubt what others are saying in that regard.

I think the double negative confused Lance. It did me at first.

"I have no reason to not believe that LR3 is better at reducing ISO noise than LR2"

I had to read that a few times to make sure I understood what you were saying.



Mar 22, 2011 at 09:32 PM
EverLearning
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p.5 #10 · 7D highlight banding


Fair enough dwweiche. But the rest of his last post makes it rather difficult to give him the benefit of the doubt.

I am truly happy for him that his camera gives clean shots. And I envy keithreeder for how his images can be from his copy. But I have my reality to deal with and that is a bad 7D copy and a manufacturer that can't be bothered to deal with it. There seems to be a few Canon apologists here who don't want to believe that I and others have problem 7Ds.



Mar 22, 2011 at 09:37 PM
Rusty1
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p.5 #11 · 7D highlight banding


keithreeder wrote:
If you can't do this with your 7D and a well-sorted workflow, the problem isn't with the camera (and as you can see from the Exif, those last two are in proper low light).


Fortunately these are about the same results I'm getting.

ISO 3200
http://www.pbase.com/rusty1/image/132850780.jpg




Mar 22, 2011 at 09:44 PM
dwweiche
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p.5 #12 · 7D highlight banding



I bought it and I would call it one of the two or three worst photography purchases I have made in nearly 30 years.


Life's too short. Sell it while the value is still somewhat high and find something that works for you and something you enjoy using. You'll just torture yourself if you continue on worrying over a chunk of plastic and metal. You can't reason with it



Mar 22, 2011 at 09:49 PM
jpeter
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p.5 #13 · 7D highlight banding


I have encountered highlight banding with my 7d. The photo needs to be pushed with contrast for me to see it. I shoot a lot of snowy landscape scenes, and have observed it by shooting a bright cloudy sky with the histogram far to the right. When I try to spread the histo out using various forms of contrast or levels, it can be seen. (using cs4) It is visible at 50% zoom.

I generally use my 5d2 for these types of shots and the 7d for wildlife stuff, so this doesn't happen much for me.

jp



Mar 22, 2011 at 09:52 PM
garyvot
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p.5 #14 · 7D highlight banding


EverLearning wrote:
OK, I'm not having a good day! Has anybody posted pictures using Skydrive? If so, can you tell me what you did to post the picture? I can copy the link, open another Firefox tab, paste it in and get to the picture, so I know the picture is accessible.

Thanks!


Yes, I use SkyDrive all the time. Here's a link to a Silverlight slideshow for a listing on the Buy/Sell board:

Gary's Past Items for Sale

You can also just paste a link directly into your post such that the photo shows up inline:

http://public.blu.livefilestore.com/y1pkfRasOyfCgaRmoaNwkrSY3cDCUMpdxYd4sh3klB_vAbbKcCOtAN0DKwW9EfToBwwmKbciDlYtn58QVZbvcBafQ/1Ds2%20MF-1.jpg

What's probably happening is that you are grabbing the URL to the photo detail page, rather than the photo itself. Click on your photo a second time so that it is opened directly in the browser window (with nothing else on the page)--THAT is the URL that you want to link to.




Mar 22, 2011 at 10:06 PM
EverLearning
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p.5 #15 · 7D highlight banding


dwweiche, your philosophy makes sense. I don't know that I would be comfortable selling my problem to some unsuspecting person. Too similar to what Canon did to me. I'm still debating whether to try Canon one more time.

Does anybody know if Canon has an ombudsman? Or a special person or department for escalating problems to?

jpeter, snowy landscapes is exactly where I saw the problem (see below). I don't have the luxury of owning multiple cameras for different scenarios.

GaryVot, thanks for the tip. Makes sense. I'll give it a try.

http://public.bay.livefilestore.com/y1pci-Ox2xW7ibs0cku0SSr2-Isev2x64jcQ7CwfBMD-4DKa_KMmzcVfnhf-i-6HV8YlCyaERKpZCn0U0BUKT661Q/vertical%20banding%20crop%20iso%20500.jpg?psid=1



Mar 22, 2011 at 10:32 PM
EverLearning
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p.5 #16 · 7D highlight banding


Hmmm, didn't put the picture in but at least the link works. The vertical banding is clearly visible in the highlights and lighter midtones. It should also be clear now that this is a very different issue than noise.




Mar 22, 2011 at 10:35 PM
mttran
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p.5 #17 · 7D highlight banding


EverLearning wrote:
Hmmm, didn't put the picture in but at least the link works. The vertical banding is clearly visible in the highlights and lighter midtones. It should also be clear now that this is a very different issue than noise.



here it is:

http://farm6.static.flickr.com/5189/5552339342_7bbb020041_b.jpg

ImageWidth - 1690
ImageLength - 1125
BitsPerSample - 16 16 16
Compression - 1 (None)
PhotometricInterpretation - 2
Make - Canon
Model - Canon EOS 7D
Orientation - Top left
SamplesPerPixel - 3
XResolution - 250.00
YResolution - 250.00
PlanarConfiguration - 1
ResolutionUnit - Inch
Software - Adobe Photoshop CS3 Windows
DateTime - 2011:03:21 21:50:09
ExifOffset - 296
ExposureTime - 1/1600 seconds
FNumber - 11
ExposureProgram - Aperture priority
ISOSpeedRatings - 500


Edited on Mar 22, 2011 at 11:47 PM · View previous versions



Mar 22, 2011 at 11:42 PM
dwweiche
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p.5 #18 · 7D highlight banding


Yes, I see them. Not normal. Was this shot RAW? Would you satisfy folks curiosity by processing with a later version of DPP (v3.9 or newer) and seeing if it's still there?

I wouldn't call him an Obudsman, but the only public face of Canon I'm aware of that reads and replies to customers emails is Chuck Westfall. There's no harm in trying him and explaining the situation. I have no idea if this email address is current. Usually I think people email him at thedigitaljournalist.com website, but that it says it's on "hiatus" So try cwestfall at cusa.canon.com

Removed "@" because I know there are a lot of email address bots out there looking for them on web pages...



Mar 22, 2011 at 11:43 PM
Daan B
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p.5 #19 · 7D highlight banding


mttran wrote:
here it is:

http://farm6.static.flickr.com/5189/5552339342_7bbb020041_b.jpg


Yep, there it is

Fortunately it can be fixed by Canon Service.



Mar 23, 2011 at 02:30 AM
EverLearning
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p.5 #20 · 7D highlight banding


dwweiche, thank you for the Canon contact name. I will follow up with him.

This was shot full RAW (not sRAW) when I did the test against my friend's 7D. Same lens, same scene, different bodies, viewed through LR 2.7 on the same monitor. His was perfectly fine. I understand the curiosity, but given that Canon has already admitted it was a sensor adjustment error, I would not expect any software to handle that. Also, I didn't bother installing DPP because I was happy with LR. I have spent so much time already running tests, documenting the heck out of it and forwarding to Canon that I am going to take a pass on that experiment. Sorry.

mttran, thank you for posting the actual image here. Clearly I am doing something wrong when I try to do so. Can you please tell me exactly what you did to post it. I have two crops of noise I would like to post for others to see and would like to get it right this time. Thanks!



Mar 23, 2011 at 06:58 AM
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