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Thread: Raw+jpg

  1. #1

    Default Raw+jpg

    Hi everyone. thanks so much for answering my previous questions. I have been reading a lot of guides and stickies since I came here, but somehow I think got one question they never really answer about RAW+JPG.

    In so far that I have read, it appears to me that WB and metering are in-camera-processings, including auto-image sharpening. While I know that this sharpening is lost in the RAW format, is it also the case for metering and WB?

    In other words, if I were to shoot in RAW+JPG format, it doesn't matter what WB or metering settings I use, it won't affect the RAW, only the JPG?

  2. #2

    Default Re: Raw+jpg

    raw captures a lot more information than jpg, since jpg is lossy. how much more, a look at the file size will tell you the whole story.

    and raw allows you to adjust stuff like wb, it also allows you to recover SOME highlight details if they are blown, and SOME shadow details. i estimate about 1 stop gain in dynamic range possibilities. but that doesn't mean that you shouldn't get the exposure right on the nail, there is always a best exposure for what you want to show.

    raw is uncooked meat, jpg is cooked somewhat, you can cook the raw further with your raw converter, but jpg is already set, not so malleable.

  3. #3

    Default Re: Raw+jpg

    so its true that whatever i change to WB does not affect the RAW at all? and what I am previewing on the LCD screen is the post-cooked JPG?

    What about metering?

  4. #4

    Default Re: Raw+jpg

    it does affect how your processing programme initially reads the RAW file, since most take the "As Shot" WB as the default WB.. of cos you can choose to tweak it, so what you're viewing on your cam's LCD is the Jpg file..

  5. #5

    Default Re: Raw+jpg

    Quote Originally Posted by meowcat View Post
    ..... it doesn't matter what WB or metering settings I use, it won't affect the RAW, only the JPG?
    Quote Originally Posted by meowcat View Post
    so its true that whatever i change to WB does not affect the RAW at all? and what I am previewing on the LCD screen is the post-cooked JPG?....
    Yes.



    Quote Originally Posted by meowcat View Post
    What about metering?
    Metering maybe fooled by bright or dark object. In such situation, for JPEG shots, one would adjust the metering to compensate on site.

    For RAW files, one has the luxury to make these adjustments during post procesing as RAW file processing typically permited EV +/-2 or more allowances.

  6. #6

    Default Re: Raw+jpg

    On 5D MK-II, LCD preview with only raw saved setting will show the WB according to what you set on the camera and not as jpg.

    When view on DPP, the WB is again retained by the image according to WB set for that pic. But I am not sure if it is due to setting recorded in the file and DPP translated it or pre-processed in the raw as response is very fast both on PC and LCD.

    Metering and iso will affect all images at it affects aperture, shutter and sensor boost when saving.

    Quote Originally Posted by meowcat View Post
    so its true that whatever i change to WB does not affect the RAW at all? and what I am previewing on the LCD screen is the post-cooked JPG?

    What about metering?

  7. #7

    Default Re: Raw+jpg

    Quote Originally Posted by spheredome View Post
    On 5D MK-II, LCD preview with only raw saved setting will show the WB according to what you set on the camera and not as jpg.
    That's because of an embedded JPEG thumbnail image.
    Alpha

  8. #8

    Default Re: Raw+jpg

    But I don't see the thumbs.db file in the CF card, MISC folder also empty.

    Quote Originally Posted by Rashkae View Post
    That's because of an embedded JPEG thumbnail image.

  9. #9
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    Default Re: Raw+jpg

    Quote Originally Posted by spheredome View Post
    But I don't see the thumbs.db file in the CF card, MISC folder also empty.
    thumbs.db is a Windows only thing... Different camera uses different ways to embed thumbnail.

  10. #10

    Default Re: Raw+jpg

    Understood. The jpg is embdded within the raw file itself. Thanks

    Quote Originally Posted by photatographer View Post
    thumbs.db is a Windows only thing... Different camera uses different ways to embed thumbnail.

  11. #11
    Moderator Octarine's Avatar
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    Default Re: Raw+jpg

    Quote Originally Posted by meowcat View Post
    What about metering?
    In which way do you think the file format has any backwards effect on the metering (which is done before the image is recorded)?

  12. #12
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    Default Re: Raw+jpg

    Quote Originally Posted by meowcat View Post
    so its true that whatever i change to WB does not affect the RAW at all? and what I am previewing on the LCD screen is the post-cooked JPG?

    What about metering?
    Quote Originally Posted by Squid View Post
    Yes.

    Metering maybe fooled by bright or dark object. In such situation, for JPEG shots, one would adjust the metering to compensate on site.

    For RAW files, one has the luxury to make these adjustments during post procesing as RAW file processing typically permited EV +/-2 or more allowances.
    I am quite sure that you still need to meter the photo properly before you capture it.
    From your reply, you seem to suggest that the metering is not important when capturing in RAW.
    Maybe RAW allows more tolerance to 'rescue' the shot later in PP (as a number of people have mentioned), but still cannot "heck-care" the metering during photgraphing.

    Am I right to say this?
    Exploring! :)

  13. #13

    Default Re: Raw+jpg

    ok so i'll just sum up that there are only a few things that the camera does automatically when you take a photo (and then convert into jpeg) These things (at whatever setting you use) will not affect the RAW, and can be tweaked PP.

    Namely these things/effects are :
    Image sharpening
    White Balance

    So like, if you know you will always capture in RAW and do postprocessing, WB on your camera isn't really that important

    Anything else, including simple things like exposure, and also metering, and of course basic focus will still be captured in the RAW file. Thus it is still our duty to make sure we get these basics right and not depend on PP

    Hope I interprete your replies correctly!

  14. #14
    Senior Member ZerocoolAstra's Avatar
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    Default Re: Raw+jpg

    Quote Originally Posted by meowcat View Post
    ok so i'll just sum up that there are only a few things that the camera does automatically when you take a photo (and then convert into jpeg) These things (at whatever setting you use) will not affect the RAW, and can be tweaked PP.

    Namely these things/effects are :
    Image sharpening
    White Balance

    So like, if you know you will always capture in RAW and do postprocessing, WB on your camera isn't really that important

    Anything else, including simple things like exposure, and also metering, and of course basic focus will still be captured in the RAW file. Thus it is still our duty to make sure we get these basics right and not depend on PP

    Hope I interprete your replies correctly!
    Yes I believe you are right. This is what I think too.
    Just wanted to mention that metering and exposure go hand-in-hand. Metering is the process of measuring the light that would fall on the sensor, in order to get a correct exposure. The RAW file does not capture the metering, but the exif data probably states the exposure compensation value, if you have set it to be so.
    Exploring! :)

  15. #15
    Moderator Octarine's Avatar
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    Default Re: Raw+jpg

    RAW is a file containing the image as captured by the sensor based on the settings the camera was operated on. If you miss the focus the image is blur. If you overexpose the image is white, if you underexpose the image is dark. Camera shake / handshake will make your image blur.
    RAW gives you all opportunities to do post-processing. As the name says: it happens after the image was taken. Whatever you can do in post-processing depends on your tools, Photoshop offers more than Canon's DPP. WB and sharpening only being two little items, there are many more. Check with your library, there are plenty of books about digital photography which always includes post-processing.

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    Default Re: Raw+jpg

    any recommended software to proces raw images from alpha 200? the seller didn't have the full box, said he lost it.

  17. #17

    Default Re: Raw+jpg

    Quote Originally Posted by Agenda View Post
    any recommended software to proces raw images from alpha 200? the seller didn't have the full box, said he lost it.
    I suppose you mean the software/CD that comes packaged with the set?

    You can always download it. Link below

    Its under "Sony Image Suite Update"

    http://www.sony.com.sg/support/downl...00k/modelfirst

    I'm an A200 user but i use lightroom instead.
    Last edited by dewei85; 22nd May 2009 at 01:40 AM.

  18. #18

    Default Re: Raw+jpg

    Why use A200. Canon is the way

  19. #19

    Default Re: Raw+jpg

    Quote Originally Posted by sabrecruz View Post
    Why use A200. Canon is the way

    why use canon, pentax is the way

  20. #20

    Default Re: Raw+jpg

    Hihi, you have the camera, right? Why don't u go out and try to overexpose/underexpose in ur shot. And download both the raw+jpeg to pc. Then you can share with us ur experience. ?

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