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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 17 Mar 2012 (Saturday) 21:57
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Is my 50D alright or something I am missing?

 
samsen
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Mar 17, 2012 21:57 |  #1

I am getting an ugly pixlation on my 50D images.
It is not much related to ISO or light condition.
Here is an eg of night shooting with low ISO of 400.
Is there anything wrong with the sensor or this is a normal behavior of 50D?
Help please.


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Carver708
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Mar 17, 2012 22:42 |  #2

What settings are you shooting? Looks like it may be shot in low resolution. Just my $.02


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samsen
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Mar 17, 2012 22:49 |  #3

Its JPG Fine, L
1/30sec
ISO 400
F 4
70-200/F4 NonIS L at 98mm


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OneJZsupra
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Mar 17, 2012 23:46 |  #4

Where these under exposed and brightened during PP?


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samsen
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Mar 18, 2012 00:57 |  #5

A tad brightened up in pp but you will see the same exact pattern of pixalation in any light condition day or night, correct EV or +/- one.


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caesar2164
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Mar 18, 2012 01:10 as a reply to  @ samsen's post |  #6

do you have low light noise correction on?

it might be blurring them a little to try to compensate for the sensor noise...


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samsen
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Mar 18, 2012 01:35 |  #7

I don't have it on.
I usually use NeatImage in PP to deal with noise but then this is rather very unusual off the camera pictures IMO compare to my any other higher or lower level Canons.
I am wondering if this is an inheritant problem of 50D or mine has a problem?

Here is another picture done in daytime with selected cropped sections. Pattern is visible all across the image, more difficult to see in on black sections.
ISO 800
F 4
Exp bias -0.3
Lens 70-200 L at 200mm
Metering mode: Pattern
White balance Auto
JPG - L


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Tiberius
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Mar 18, 2012 02:57 |  #8

Looks like noise to me...


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samsen
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Mar 18, 2012 10:39 |  #9

Thanks a lot.

Any 50D owner, can you share with me if this a usual 50D condition on JPG?


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Nickareno
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Mar 18, 2012 11:11 |  #10

Looks normal to me.


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Andy ­ R
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Mar 18, 2012 14:51 |  #11

looks normal to me, quit pixel peeping, it will drive you mad!


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gregnash
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Mar 18, 2012 14:57 |  #12

Have you tried shooting in RAW to see if it yields the same results? If so then there may be an issue with the sensor but like Andy R said, this looks normal, stop pixel peepin. LOL


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Tom ­ Reichner
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Mar 18, 2012 15:26 |  #13

samsen wrote in post #14106976 (external link)
Thanks a lot.

Any 50D owner, can you share with me if this a usual 50D condition on JPG?

I shoot primarily with a 50D. I do not shoot at ISO 800 for this reason. Ever.

Try shooting another well-lit, outdoor image at ISO 800. By well-lit, I mean that you would be shooting at around f5.6, 1/2000 second, ISO 800.
Then, take another identical shot at f5.6, 1/500 second, ISO 200.

Crop each image to 100%. If you notice that the image shot at ISO 200 does not exhibit this problem to the same extent, then that will confirm my suspicions - that this is simply noise due to shooting at higher ISOs.
If the ISO 200 image looks just as bad as the ISO 800 image, then something is wrong with your 50D.

Oh, yeah - one more thing. Feel free to keep on pixel-peeping. How will you continue to improve the technical excellence of your imagery unless you examine your images closely, and continually strive to make improvements?


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Jason ­ Paul
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Mar 18, 2012 18:05 as a reply to  @ Tom Reichner's post |  #14

I have a 50D and just looked through some photos that I shot as JPEG at 400 and 800. The conditions were different, but regarding noise, I think they look very similar to yours. So, I'm betting it's just noise related to ISO.

I start noticing noise (at 100% crop) on my 50D at 400 and up. It's not terrible, but I notice it.

Supposedly it's not as noticeable when printed.

I'd recommend shooting raw and checking that, and also trying the experiment above by Tom to see if you see any different results.

Jason


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jrbdmb
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Mar 18, 2012 18:41 |  #15

When I see square "blocks" like in the photos above I suspect these are JPG artifacts. I just looked at some RAWs from my 50D in Lightroom 4 shot at 1000 ISO, there is definitely noise but nothing like in your pictures. As said above take a few pics with RAW + JPG and compare them.


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Is my 50D alright or something I am missing?
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