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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 23 Mar 2010 (Tuesday) 18:21
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Viewing on camera LCD - am I seeing the actual RAW?

 
trale
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Mar 23, 2010 18:21 |  #1

The question I ask is that when I transfer my RAW files to my Win7 PC, I have the Canon codec installed, which lets me immediately preview a smaller version of the RAW file with any image viewer, without having to process the RAW first.

So I'm wondering if this is how the camera (on 40D or 7D) displays RAW files. Do they also display this smaller version of the RAW, or is it the genuine RAW?




  
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Jim ­ G
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Mar 23, 2010 18:22 |  #2

You're seeing an embedded .jpg which is contained within the raw file.


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davebmck
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Mar 23, 2010 18:44 as a reply to  @ Jim G's post |  #3

The image you see on your lcd is the same image you would get if you were shooting jpeg on your camera. It is a jpeg file and the histogram represents that jpeg file, not your raw file.


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lettershop
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Mar 23, 2010 18:52 |  #4

and the LCD image has the white balance, sharpening, quality etc. that you have set up for the JPEG conversion. It can be very different than the RAW image


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trale
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Mar 23, 2010 19:01 |  #5

davebmck wrote in post #9857251 (external link)
The image you see on your lcd is the same image you would get if you were shooting jpeg on your camera. It is a jpeg file and the histogram represents that jpeg file, not your raw file.

Jim G wrote:
You're seeing an embedded .jpg which is contained within the raw file.

Hi guys, thanks for responses, but there is still a conflict in the answers. These are 2 different things: the embedded JPEG, or a JPEG version of the RAW.

For now, Jim G's answer make more sense, because when I view the RAW directly on my PC, that is indeed the "embedded JPG" within the RAW, which is smaller rez file than the RAW. This would explain the softness of images when I zoom in on the 40D's LCD. If I was viewing the full-sized JPEG version of a RAW, there shouldn't be such fuzziness.

Can anyone clarify?




  
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Jim ­ G
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Mar 23, 2010 19:02 |  #6

trale wrote in post #9857331 (external link)
Hi guys, thanks for responses, but there is still a conflict in the answers. These are 2 different things: the embedded JPEG, or a JPEG version of the RAW.

For now, Jim G's answer make more sense, because when I view the RAW directly on my PC, that is indeed the "embedded JPG" within the RAW, which is smaller rez file than the RAW. This would explain the softness of images when I zoom in on the 40D's LCD. If I was viewing the full-sized JPEG version of a RAW, there shouldn't be such fuzziness.

Can anyone clarify?

You are correct.

The embedded .jpg is much smaller than full resolution - if you shoot RAW and try to zoom in on your LCD you will find that you will lose detail much more quickly than if you were to shoot a full-res JPG and zoom in on that.


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davebmck
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Mar 23, 2010 20:18 as a reply to  @ Jim G's post |  #7

I haven't seen that problem on my camera. I can zoom to 100% and see whether the image is sharp or not. Of course the screen is small, so you just can't see the level of detail there that you can see on a larger screen.

As I understand it, there is not actually a jpeg file embedded in the raw file. What is embedded is the settings the camera used to convert the raw file to the jpeg image. When you view your raw file on your computer screen, you are not viewing a raw image, no such thing exists. Instead, the raw data is converted to an image file based on whatever default setting are set in the software. Your camera settings are pretty much ignored. Perhaps if you use the Canon DPP software, you might get the same image as the jpeg image the camera creates for viewing on you lcd.


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krb
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Mar 23, 2010 20:22 |  #8

davebmck wrote in post #9857786 (external link)
As I understand it, there is not actually a jpeg file embedded in the raw file.

Yes, there is. That's what you are viewing when you review the image on the camera's rear LCD screen.

What is embedded is the settings the camera used to convert the raw file to the jpeg image. When you view your raw file on your computer screen, you are not viewing a raw image, no such thing exists. Instead, the raw data is converted to an image file based on whatever default setting are set in the software. Your camera settings are pretty much ignored. Perhaps if you use the Canon DPP software, you might get the same image as the jpeg image the camera creates for viewing on you lcd.

This is mostly true once you get to the computer. You are still viewing the embedded jpg when you are using most of the browsing apps like Adobe Bridge.


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davebmck
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Mar 23, 2010 20:48 as a reply to  @ krb's post |  #9

In Lightroom and ACR, what you are viewing depends on what camera profile you have set in the software, so it is not likely to be the same as the "embedded" jpeg. Those programs also have their own default settings for sharpness, black level, etc. You may be right about Bridge, since what you see there is just a preview file.


Canon 5D Mark II, 1D Mark IV
Canon 17-40mm f/4L, Canon 100-400mm f/4.5-5.6L IS,
Canon 100mm F2.8 USM Macro, Canon 50mm F1.8
Canon 24-105mm f/4L IS, Canon 500mm f/4L IS, Gitzo 3530LS Tripod, RRS BH-55 Ball Head
Canon 580EX II and 430EX Flash, Canon MR-14 EX Ring Flash

  
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Viewing on camera LCD - am I seeing the actual RAW?
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