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How to get the best raw exposure, part 2

JimKasson
May 9, 2023
chat_bubble_outline 810
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    DanHasLeftForum
    Members 4254 posts
    May 14, 2023, 1:51 a.m. May 14, 2023, 1:51 a.m.
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    @bobn2 has written:
    @DonaldB has written:

    if anyone wants to prove my findings incorrect then be my guest DO YOUR OWN TESTING is that so hard or life threatening ?

    I you follow Jim's site you'll find he does loads of his own tests with much more rigour and a level of experimental design that you likely couldn't conceive of.
    (BTW, your daughter will probably tell you that a preposition is something that you should never end a sentence with. Sorry about that).

    @DonaldB has written:

    Im not ashamed about my poor English writing skills

    Maybe he should get some lessons from his daughter or get her to proof read his posts or better yet, write them for him.

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    DonaldB
    Members 2365 posts
    May 14, 2023, 2:02 a.m. May 14, 2023, 2:02 a.m.
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    @JimKasson has written:
    @DonaldB has written:

    This is the discovery, your histogram is RGB mine are not using live histogram. has your camera just luminosity live histogram ? and if it does ,does it match the rgb ?

    The X2D doesn't have a live histogram. It computes the review histogram from the JPEG preview image, just like the Sony cameras do for live histo and review histo.

    By the way, this is a serous omission which I hope will soon be fixed. The GFX 100S has a live RGB histogram.

    see, viewing my jpegs in FRV they are clipped quite a bit. but on the camera they show no clipping at all. so i disagree that sony cameras are using the jpeg for the histogram and zebras. but the funny thing is the blinkies do clip reviewing on the camera but the RGB histogram is not.

    1395 raw.jpg

    1395 jpeg.jpg

    63K03402.JPG

    63K03402.JPG

    JPG, 5.8 MB, uploaded by DonaldB on May 14, 2023.

    1395 raw.jpg

    JPG, 160.0 KB, uploaded by DonaldB on May 14, 2023.

    1395 jpeg.jpg

    JPG, 122.5 KB, uploaded by DonaldB on May 14, 2023.

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    DonaldB
    Members 2365 posts
    May 14, 2023, 2:37 a.m. May 14, 2023, 2:37 a.m.
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    Jpeg or raw or other used for Histogram
    lets also be realistic here. i had to use a jewelers loupe to see the end of the histogram then and shot the image with a macro lens.
    please click on the camera histogram to get an idea how fine the scale is.

    raw 1398.jpg

    1398.JPG

    1398 jpeg.jpg

    1398.JPG

    JPG, 577.1 KB, uploaded by DonaldB on May 14, 2023.

    raw 1398.jpg

    JPG, 162.2 KB, uploaded by DonaldB on May 14, 2023.

    1398 jpeg.jpg

    JPG, 129.8 KB, uploaded by DonaldB on May 14, 2023.

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    IliahBorg
    Members 976 posts
    May 14, 2023, 3:02 a.m. May 14, 2023, 3:02 a.m.
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    @DonaldB has written:

    63K03402.JPG

    Clear clipping here.

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    JimKasson
    Members 1738 posts
    May 14, 2023, 3:11 a.m. May 14, 2023, 3:11 a.m.
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    @IliahBorg has written:
    @DonaldB has written:

    63K03402.JPG

    Clear clipping here.

    In Y, G, and B.

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    DonaldB
    Members 2365 posts
    May 14, 2023, 3:12 a.m. May 14, 2023, 3:12 a.m.
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    @IliahBorg has written:
    @DonaldB has written:

    63K03402.JPG

    Clear clipping here.

    1399raw.jpg

    63K03414.JPG

    63K03414.JPG

    JPG, 1.2 MB, uploaded by DonaldB on May 14, 2023.

    1399raw.jpg

    JPG, 160.9 KB, uploaded by DonaldB on May 14, 2023.

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    DonaldB
    Members 2365 posts
    May 14, 2023, 3:15 a.m. May 14, 2023, 3:15 a.m.
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    @JimKasson has written:
    @IliahBorg has written:
    @DonaldB has written:

    63K03402.JPG

    Clear clipping here.

    In Y, G, and B.

    oh no its not Jim look at the image at 100% 😁

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    DonaldB
    Members 2365 posts
    May 14, 2023, 3:16 a.m. May 14, 2023, 3:16 a.m.
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    @IliahBorg has written:
    @DonaldB has written:

    63K03402.JPG

    Clear clipping here.

    look at the image at 100%

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    SrMi
    Members 457 posts
    May 14, 2023, 3:38 a.m. May 14, 2023, 3:38 a.m.
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    @DonaldB has written:
    @IliahBorg has written:
    @DonaldB has written:

    63K03402.JPG

    Clear clipping here.

    look at the image at 100%

    Clipping.
    Don't you see the difference between red (no clipping) and Y, G, and B curves?

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    Quarkcharmed
    Members 184 posts
    May 14, 2023, 3:42 a.m. May 14, 2023, 3:42 a.m.
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    @DonaldB has written:
    @IliahBorg has written:
    @DonaldB has written:

    63K03402.JPG

    Clear clipping here.

    look at the image at 100%

    The G and B channels touch the right edge - that means clipping (after applying WB obviously). There would have been to clipping had there been no touching, as in the R channel.

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    JimKasson
    Members 1738 posts
    May 14, 2023, 3:48 a.m. May 14, 2023, 3:48 a.m.
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    @DonaldB has written:
    @JimKasson has written:
    @IliahBorg has written:
    @DonaldB has written:

    63K03402.JPG

    Clear clipping here.

    In Y, G, and B.

    oh no its not Jim look at the image at 100% 😁

    I think my next Lensrentals article will be about how to read histograms.

    TimRichards, IliahBorg, TonyBeach and 2 other users like this.

    favorite 5

  • link
    DonaldB
    Members 2365 posts
    May 14, 2023, 3:51 a.m. May 14, 2023, 3:51 a.m.
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    @JimKasson has written:
    @DonaldB has written:
    @JimKasson has written:
    @IliahBorg has written:
    @DonaldB has written:

    63K03402.JPG

    Clear clipping here.

    In Y, G, and B.

    oh no its not Jim look at the image at 100% 😁

    I think my next Lensrentals article will be about how to read histograms.

    you havent answered this one yet
    63K03414.JPG

    63K03414.JPG

    JPG, 1.2 MB, uploaded by DonaldB on May 14, 2023.

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    DonaldB
    Members 2365 posts
    May 14, 2023, 3:54 a.m. May 14, 2023, 3:54 a.m.
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    everyones eyesight fading 4x microscope objective 😁

    63K03418.JPG

    63K03415.JPG

    63K03416.JPG

    63K03417.JPG

    63K03417.JPG

    JPG, 4.5 MB, uploaded by DonaldB on May 14, 2023.

    63K03418.JPG

    JPG, 4.5 MB, uploaded by DonaldB on May 14, 2023.

    63K03416.JPG

    JPG, 4.3 MB, uploaded by DonaldB on May 14, 2023.

    63K03415.JPG

    JPG, 3.9 MB, uploaded by DonaldB on May 14, 2023.

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    DonaldB
    Members 2365 posts
    May 14, 2023, 3:58 a.m. May 14, 2023, 3:58 a.m.
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    @JimKasson has written:
    @DonaldB has written:
    @JimKasson has written:
    @IliahBorg has written:
    @DonaldB has written:

    63K03402.JPG

    In Y, G, and B.

    oh no its not Jim look at the image at 100% 😁

    I think my next Lensrentals article will be about how to read histograms.

    With a 4x microscope objective 🤣

  • link
    DonaldB
    Members 2365 posts
    May 14, 2023, 4:01 a.m. May 14, 2023, 4:01 a.m.
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    @Quarkcharmed has written:
    @DonaldB has written:
    @IliahBorg has written:
    @DonaldB has written:

    63K03402.JPG

    Clear clipping here.

    look at the image at 100%

    The G and B channels touch the right edge - that means clipping (after applying WB obviously). There would have been to clipping had there been no touching, as in the R channel.

    its really accurate though isnt it. compared to the FRV program. look how far out the jpeg is by comparison.

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    Deleted Removed user
    May 14, 2023, 4:02 a.m. May 14, 2023, 4:02 a.m.
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    Donald and Alf win - nobody else knows anything ..,..

    ... must be time to lock this benighted thread, IMNSHO

    IanSForsyth likes this.

    favorite 1

  • link
    DonaldB
    Members 2365 posts
    May 14, 2023, 4:02 a.m. May 14, 2023, 4:02 a.m.
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    wait till i narrow it down to 10 pixels . i have my gear set up and the microscope objective. i will nail it its only a matter of the light 😁

  • link
    DonaldB
    Members 2365 posts
    May 14, 2023, 4:23 a.m. May 14, 2023, 4:23 a.m.
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    Smashed it out the park.

    1402.jpg

    Luminance from main menu.

    Total luminence.jpg

    L1402.jpg

    g1402.jpg

    b1402.jpg

    r1402.jpg

    Total luminence.jpg

    JPG, 879.5 KB, uploaded by DonaldB on May 14, 2023.

    g1402.jpg

    JPG, 1.1 MB, uploaded by DonaldB on May 14, 2023.

    r1402.jpg

    JPG, 576.7 KB, uploaded by DonaldB on May 14, 2023.

    b1402.jpg

    JPG, 1.0 MB, uploaded by DonaldB on May 14, 2023.

    L1402.jpg

    JPG, 560.9 KB, uploaded by DonaldB on May 14, 2023.

    1402.jpg

    JPG, 156.3 KB, uploaded by DonaldB on May 14, 2023.

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