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Author Topic: Help needes: EOS 7D - noisy pictures  (Read 8360 times)

daniela

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Help needes: EOS 7D - noisy pictures
« on: July 03, 2013, 02:43:38 PM »
Hi!

I bought an refurbished 7D for my son. A few days ago, he was on an airshow and took some shots.
But he is very disappointed, because the pictures are very noisy.
He shot faster then 1/1250, Auto Iso,  Exposure: spot, +1/3-2/3.

So I called the Canon service center, who told me that this is normal for the 7D.
Is it really? Which Iso is maximum to get no noisy pictures?

As an attachment, one example, where the noise is extremly visible. This frame shows the full picture
Thanks
Dani

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Help needes: EOS 7D - noisy pictures
« on: July 03, 2013, 02:43:38 PM »

Cannon Man

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Re: Help needes: EOS 7D - noisy pictures
« Reply #1 on: July 03, 2013, 03:20:58 PM »
It is just that noisy. Perfectly normal. This is not the first post about this on the forums..

retina

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Re: Help needes: EOS 7D - noisy pictures
« Reply #2 on: July 03, 2013, 03:27:36 PM »
since this is shot in raw, applying some noise reduction in LR would help

DJD

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Re: Help needes: EOS 7D - noisy pictures
« Reply #3 on: July 03, 2013, 03:44:13 PM »
Dani,
You said "This frame shows the full picture". I have a 7D and I've never seen noise like this using ISO 200 except for extreme crops or if you push the exposure a lot in post proccesing. Taking a close look at the noise it looks more like JPEG artifacts. I can even see what looks like the 8x8 macroblock structure.

If this truly is the full image that was captured I would ask the following.
1. What recording format were you using? Large, Medium, Small, RAW, M-RAW, S-RAW?
2. How was this rendered to the JPEG image shown? In the camera, in post processing. With what tool and setting.

Cheers,
Doug
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Harv

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Re: Help needes: EOS 7D - noisy pictures
« Reply #4 on: July 03, 2013, 04:12:18 PM »
I could be wrong here, but to me this looks more like a 100% crop.  I just can't imagine a full frame shot looking that soft.
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East Wind Photography

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Re: Help needes: EOS 7D - noisy pictures
« Reply #5 on: July 03, 2013, 04:16:27 PM »
It looks like JPG compression noise..maybe either in camera or was adjusted again using software?

I typically shoot in RAW mode only and turn off Highlight tone priority and high ISO noise reduction.  Sometimes the HINR can introduce noise even when not shooting high ISO....even in RAW mode.

Also, you can overexpose the sky quite a bit and pull the exposure back down with software like lightroom.  That also can reduce noise.  However I have not seen this kind of noise on any of my canon bodies including my old T2i.


neuroanatomist

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Re: Help needes: EOS 7D - noisy pictures
« Reply #6 on: July 03, 2013, 04:20:50 PM »
Sometimes the HINR can introduce noise even when not shooting high ISO....even in RAW mode.

HINR shouldn't affect the RAW file - you're saying it does?  Can you show examples?
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Re: Help needes: EOS 7D - noisy pictures
« Reply #6 on: July 03, 2013, 04:20:50 PM »

AprilForever

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Re: Help needes: EOS 7D - noisy pictures
« Reply #7 on: July 03, 2013, 04:26:48 PM »
Is this image pre or post processing? It looks quite underexposed as it is...
What is truth?

daniela

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Re: Help needes: EOS 7D - noisy pictures
« Reply #8 on: July 03, 2013, 04:39:00 PM »
This photo was taken in normal raw.
I took an screenshot of this picture in Lightroom, because the aperture,ISO,... are visible.


In my opinion, the Cam suffers from an electronic damage.
I looked at the pictures (about 2500) and some things make me think of an electronic problem:
1.) I takes about 8-10 pictures from an (even slow moving (rolling) plane until the first one is really sharp.
2.) Some pics are sharp and have an good IQ at Iso 800 ( max. Iso 800), others are noisy at 200....




daniela

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Re: Help needes: EOS 7D - noisy pictures
« Reply #9 on: July 03, 2013, 04:41:30 PM »
Is this image pre or post processing? It looks quite underexposed as it is...
the pics are like shown in lightroom without any changes

yellowkamper

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Re: Help needes: EOS 7D - noisy pictures
« Reply #10 on: July 03, 2013, 05:31:48 PM »
Its not noisy it just out of focus

hamada

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Re: Help needes: EOS 7D - noisy pictures
« Reply #11 on: July 03, 2013, 06:37:09 PM »
Its not noisy it just out of focus

it is out of focus... but it´s noisy too.
if this is not a crop it´s really bad quality.


« Last Edit: July 03, 2013, 06:39:09 PM by hamada »

hamada

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Re: Help needes: EOS 7D - noisy pictures
« Reply #12 on: July 03, 2013, 06:41:08 PM »
It looks like JPG compression noise..maybe either in camera or was adjusted again using software?

it´s an raw image she is talking about.. see the screenshot.

Quote
Sometimes the HINR can introduce noise even when not shooting high ISO....even in RAW mode.

it does not affect RAW at all when we trust the manual.
and i never heard about this option affecting RAW... you have a source?
« Last Edit: July 03, 2013, 06:44:24 PM by hamada »

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Re: Help needes: EOS 7D - noisy pictures
« Reply #12 on: July 03, 2013, 06:41:08 PM »

unfocused

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Re: Help needes: EOS 7D - noisy pictures
« Reply #13 on: July 03, 2013, 07:15:04 PM »
Pretty hard to diagnose from one picture or even one shoot. I'd say take it outside and shoot a bunch of simple pictures – flowers, trees, pets, etc. See if you are getting noise under normal conditions. If so, send it back.
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Re: Help needes: EOS 7D - noisy pictures
« Reply #14 on: July 03, 2013, 07:59:43 PM »
There is a lot of haze around the plane, and he appears to be moving fast, you can see the engines going full blast. 
I would not call this noise, its just the haze.
 
« Last Edit: July 03, 2013, 08:02:39 PM by Mt Spokane Photography »

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Re: Help needes: EOS 7D - noisy pictures
« Reply #14 on: July 03, 2013, 07:59:43 PM »