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Thread started 15 Jul 2012 (Sunday) 16:34
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1100D Noisy Images

 
tiaanb
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Jul 15, 2012 16:34 |  #1

I recently acquired an 1100D, I had a 1000D before that was stolen from me.

I've noticed that with my particular 1100, the images are extremely noisy even at low ISO.

I shoot in RAW, 100/200 ISO with a speedlite and still get loads of noise. I can get rid of the noise in editing, but then the whole image goes soft.

Is this an artifact of 1100D's sensor? Or is there something wrong with my camera?




  
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Preeb
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Jul 15, 2012 16:37 |  #2

tiaanb wrote in post #14720533 (external link)
I recently acquired an 1100D, I had a 1000D before that was stolen from me.

I've noticed that with my particular 1100, the images are extremely noisy even at low ISO.

I shoot in RAW, 100/200 ISO with a speedlite and still get loads of noise. I can get rid of the noise in editing, but then the whole image goes soft.

Is this an artifact of 1100D's sensor? Or is there something wrong with my camera?

Photo samples?


Rick
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tiaanb
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Jul 15, 2012 16:42 as a reply to  @ Preeb's post |  #3

I'm new to this forum. Can I upload samples direct to here, or somewhere else first then link?




  
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tiaanb
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Jul 15, 2012 16:56 as a reply to  @ tiaanb's post |  #4

Here are photo samples.

Sample 1 was at ISO 200.
Sample 2 was at ISO 100.

Both zoomed to 100% and cropped to show the noise.
Sample 1 (external link)
Sample 2 (external link)




  
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elysium
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Jul 15, 2012 17:10 |  #5

Photos look unexposed to me hence the noise is more apparent. Is this a crop of the image or the full res resized?


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tiaanb
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Jul 15, 2012 17:24 as a reply to  @ elysium's post |  #6

It is a 100% crop. Zoomed into 100% in PSPP, then cropped it right there.

I had the speedlite one stop off full power for this image.




  
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lannes
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Jul 15, 2012 17:27 |  #7

elysium wrote in post #14720649 (external link)
Photos look unexposed to me hence the noise is more apparent. Is this a crop of the image or the full res resized?

+1 noise caused by underexposure, try the flash on a normal subject at the metered exposure


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Stone ­ 13
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Jul 15, 2012 17:33 |  #8

as stated, the shots look to be about a stop underexposed which will result in more noise regardless of camera.


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tiaanb
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Jul 15, 2012 17:42 as a reply to  @ Stone 13's post |  #9

Thank you for all the replies, it is much appreciated.

Sample image 1 was shot at 1/160 at f/4.
Sample image 2 was shot at 1/125 at f/4.5

Both in manual on the camera, depending on what minimum aperture the lens can do at that focal length. I used the same lens for both photographs, just different days & different conditions.

How can I remedy this in the future? My flashlites need to be manually controlled.

As an aside, I do not claim to be a pro photog, so do not want to claim that title for myself. I am here to learn. I merely wanted to get the question answered before I go shout at Canon for making a bad camera.




  
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davidc502
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Jul 15, 2012 17:55 |  #10

Take a look at the histogram. Where are the bars? Can you post a copy of the histogram?


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tiaanb
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Jul 15, 2012 18:08 |  #11

davidc502 wrote in post #14720781 (external link)
Take a look at the histogram. Where are the bars? Can you post a copy of the histogram?

I will try. My best shot is screen grab out of PSPP.




  
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tiaanb
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Jul 15, 2012 18:15 |  #12

Does this help at all?

IMAGE: https://photography-on-the.net/forum/images/hostedphotos_lq/2012/07/3/LQ_605994.jpg
Image hosted by forum (605994) © tiaanb [SHARE LINK]
THIS IS A LOW QUALITY PREVIEW. Please log in to see the good quality stuff.



  
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Jul 15, 2012 18:21 as a reply to  @ davidc502's post |  #13

tiaanb wrote in post #14720846 (external link)
Does this help at all?

Yes. The graph should be shifted more to the right, i.e., more exposure.

The camera's ambient meter and flash meter are only guidelines.

My doll as metered by the camera:

IMAGE: http://i735.photobucket.com/albums/ww357/oldvultureface/POTN/IMG_1513.jpg

As metered by me:

IMAGE: http://i735.photobucket.com/albums/ww357/oldvultureface/POTN/IMG_1515.jpg

200% crops to show the difference in noise levels. No noise reduction applied to RAW's:

IMAGE: http://i735.photobucket.com/albums/ww357/oldvultureface/POTN/Untitled-1-6.jpg

IMAGE: http://i735.photobucket.com/albums/ww357/oldvultureface/POTN/Untitled-2-2.jpg



  
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tiaanb
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Jul 15, 2012 18:28 as a reply to  @ oldvultureface's post |  #14

Stupid question:
How do I get the camera to accept my metering as opposed to its own?

I never had issues with noisy images at ISO 100/200 with my 1000D?




  
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Preeb
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Jul 15, 2012 18:53 |  #15

elysium wrote in post #14720649 (external link)
Photos look unexposed to me hence the noise is more apparent. Is this a crop of the image or the full res resized?

Yes, definitely underexposed. Digital photography just doesn't take to underexposure. Often you get better results with a slight overexposure, even if you have to go to a higher ISO to achieve it.

tiaanb wrote in post #14720884 (external link)
Stupid question:
How do I get the camera to accept my metering as opposed to its own?

I never had issues with noisy images at ISO 100/200 with my 1000D?

I've never used the 1000/1100 series, but there should be some way to set exposure compensation. In reality, it shouldn't be doing that unless the EC has been set to underexpose. Did you buy it used? It may still have the previous owner's settings. There should be something in the menu to reset everything to the factory defaults.

Sorry, I didn't read about the fact that you are using manual. In that case you just have to open it up more.


Rick
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