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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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  • link
    DonaldB
    Members 2442 posts
    May 14, 2023, 3:51 a.m. May 14, 2023, 3:51 a.m.
    link
    @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.

  • link
    DonaldB
    Members 2442 posts
    May 14, 2023, 3:54 a.m. May 14, 2023, 3:54 a.m.
    link

    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.

  • link
    DonaldB
    Members 2442 posts
    May 14, 2023, 3:58 a.m. May 14, 2023, 3:58 a.m.
    link
    @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 2442 posts
    May 14, 2023, 4:01 a.m. May 14, 2023, 4:01 a.m.
    link
    @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.

  • link
    Deleted Removed user
    May 14, 2023, 4:02 a.m. May 14, 2023, 4:02 a.m.
    link

    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 2442 posts
    May 14, 2023, 4:02 a.m. May 14, 2023, 4:02 a.m.
    link

    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 2442 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.

  • link
    IanSForsyth
    Members 216 posts
    May 14, 2023, 4:25 a.m. May 14, 2023, 4:25 a.m.
    link

    [quote="@xpatUSA"]
    Donald and Alf win - nobody else knows anything ..,..

    Look Officer there is no way that I could be speeding and there is no way that I was traveling at 150 kmph when my speedometer only goes to 100

  • link
    DonaldB
    Members 2442 posts
    May 14, 2023, 4:31 a.m. May 14, 2023, 4:31 a.m.
    link
    @IanSForsyth has written:

    [quote="@xpatUSA"]
    Donald and Alf win - nobody else knows anything ..,..

    Look Officer there is no way that I could be speeding and there is no way that I was traveling at 150 kmph when my speedometer only goes to 100

    But officer you need to read the speed signs posted. 😁

  • link
    IanSForsyth
    Members 216 posts
    May 14, 2023, 4:38 a.m. May 14, 2023, 4:38 a.m.
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    Maybe I can take the Officer in the vehicle and show them with a macro image taken of the speedometer and the pedal to the metal showing them that the car indeed has not gone over 100

  • link
    DonaldB
    Members 2442 posts
    May 14, 2023, 4:47 a.m. May 14, 2023, 4:47 a.m.
    link
    @IanSForsyth has written:

    Maybe I can take the Officer in the vehicle and show them with a macro image taken of the speedometer and the pedal to the metal showing them that the car indeed has not gone over 100

    7 pixels (not rgb )= 1/3 of a stop this is my live histogram
    and the line at the end is the boarder not clipping 😎
    1404L.jpg

    1404.jpg

    1404L.jpg

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

    1404.jpg

    JPG, 165.0 KB, uploaded by DonaldB on May 14, 2023.

  • link
    Quarkcharmed
    Members 184 posts
    May 14, 2023, 5:41 a.m. May 14, 2023, 5:41 a.m.
    link
    @DonaldB has written:
    @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.

    Again, change WB in camera and check how this histogram changes on the same scene and all other settings except the WB.

  • link
    DonaldB
    Members 2442 posts
    May 14, 2023, 6:03 a.m. May 14, 2023, 6:03 a.m.
    link
    @Quarkcharmed has written:
    @DonaldB has written:
    @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.

    Again, change WB in camera and check how this histogram changes on the same scene and all other settings except the WB.

    we are discussing how accurate the in-camera histogram is compared to the raw image opened in Fast Raw Viewer. and in fact other software like photoshop as well. I dont care how it gets there.

  • link
    DonaldB
    Members 2442 posts
    May 14, 2023, 6:08 a.m. May 14, 2023, 6:08 a.m.
    link

    can someone tell me how many stops this image is over exposed from the numbers.
    Thanks
    1402.jpg

    and this one to please
    1404 crop.jpg

    1404 crop.jpg

    JPG, 154.0 KB, uploaded by DonaldB on May 14, 2023.

    1402.jpg

    JPG, 68.3 KB, uploaded by DonaldB on May 14, 2023.

  • link
    DonaldB
    Members 2442 posts
    May 14, 2023, 7:14 a.m. May 14, 2023, 7:14 a.m.
    link

    Dont worry i read the Manual for FRV its accurate as myself and the camera will ever be. Thanks Illah well worth the money. just to say i told you all so 😁

    My kind of English, nice program Illah, if anyone wants to get into some great discussions, buy it. i highly recommend it. as its the level playing field that every tech head plays on.

    Screenshot 2023-05-14 165825.jpg

    and for the record, of course the RGB histograms are very slightly clipped, if i hadnt clipped them and had the numbers to prove it on FRV everyone would have said i still had 3 stops to saturation 😁

    Screenshot 2023-05-14 165825.jpg

    JPG, 36.9 KB, uploaded by DonaldB on May 14, 2023.

  • link
    Quarkcharmed
    Members 184 posts
    May 14, 2023, 7:29 a.m. May 14, 2023, 7:29 a.m.
    link
    @DonaldB has written:
    @Quarkcharmed has written:
    @DonaldB has written:
    @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.

    Again, change WB in camera and check how this histogram changes on the same scene and all other settings except the WB.

    we are discussing how accurate the in-camera histogram is compared to the raw image opened in Fast Raw Viewer. and in fact other software like photoshop as well. I dont care how it gets there.

    And again - in-camera histogram is produced from processed images, raw histogram - from unprocessed images, so it shows what you have for further processing, and it's most accurate.

    IliahBorg likes this.

    favorite 1

  • link
    DonaldB
    Members 2442 posts
    May 14, 2023, 7:38 a.m. May 14, 2023, 7:38 a.m.
    link
    @Quarkcharmed has written:

    raw histogram - from unprocessed images, so it shows what you have for further processing, and it's most accurate.

    But its no more accurate at determining the ultimate contrasty scene exposure as is the in-camera histogram, especially the sony live histogram. the only problem is you need a 3x jewelers loupe to see it properly 😁

  • link
    acskinner
    Members 17 posts
    May 14, 2023, 7:43 a.m. May 14, 2023, 7:43 a.m.
    link

    Back to the Lens Rentals item it ends with a very simple set of instructions that boil down to making sure you don't blow the highlights and not "underexposing" by more than four stops. This isn't far from my own practice of not blowing the preview highlights and using base ISO or the first step on dual conversion gain. Assuming these suggestions are sound it seems to make all the more subtle debate superfluous.

    JimKasson likes this.

    favorite 1

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