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Scene luminance has nothing to do with exposure.

DonaldB
June 16, 2023
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    DonaldB
    Members 2365 posts
    June 24, 2023, 10:47 p.m. June 24, 2023, 10:47 p.m.
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    @xpatUSA has written:

    no comment

    😁😎

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    DonaldB
    Members 2365 posts
    June 24, 2023, 10:48 p.m. June 24, 2023, 10:48 p.m.
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    @IanSForsyth has written:
    @DonaldB has written:

    16 bit converted raw read 250 250 250" do i need to explain ?

    Yes and I will ask again
    What WB was used?
    What color profile was used?
    What curves are used?
    What BLE was used?

    Like you say what don't you understand ?
    If you don't understand go back to John's post and review

    as ive said it doesnt matter as the jpeg is clipped. couldnt care less what the raw is because the info is all there.
    your out of ammo give up.

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    IanSForsyth
    Members 216 posts
    June 24, 2023, 10:50 p.m. June 24, 2023, 10:50 p.m.
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    @DonaldB has written:

    couldnt care less what the raw is because the info is all there

    And those values that you converted to a 16 bit file that read 250 250 250 are not raw data

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    DonaldB
    Members 2365 posts
    June 24, 2023, 10:53 p.m. June 24, 2023, 10:53 p.m.
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    @IanSForsyth has written:
    @DonaldB has written:

    couldnt care less what the raw is because the info is all there

    And those values that you converted to a 16 bit file that read 250 250 250 are not raw data

    I dont care what the raw file is doing ,the fact remains the OOC jpegs has clipped and unreadable information. the raw does not.
    and the camera histogram represents the raw file NOT the jpeg.

    zoom in on the camera histogram

    63K03478.JPG

    63K03478.JPG

    JPG, 2.3 MB, uploaded by DonaldB on June 24, 2023.

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    IanSForsyth
    Members 216 posts
    June 24, 2023, 10:53 p.m. June 24, 2023, 10:53 p.m.
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    @DonaldB has written:

    as ive said it doesnt matter as the jpeg is clipped.

    You do realize that if you change the color profile that created that jpeg or even the color space used that jpeg image it may not even show clipping

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    DonaldB
    Members 2365 posts
    June 24, 2023, 10:58 p.m. June 24, 2023, 10:58 p.m.
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    @IanSForsyth has written:
    @DonaldB has written:

    as ive said it doesnt matter as the jpeg is clipped.

    You do realize that if you change the color profile that created that jpeg or even the color space used that jpeg image it may not even show clipping

    I have read a paper about using the incamera histogram as a luminence meter and they said auto WB is the best setting. My cameras dont
    have RGB live histograms.

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    Deleted Removed user
    June 24, 2023, 10:59 p.m. June 24, 2023, 10:59 p.m.
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    @IanSForsyth has written:
    @DonaldB has written:

    as ive said it doesnt matter as the jpeg is clipped.

    You do realize that if you change the color profile that created that jpeg or even the color space used that jpeg image it may not even show clipping

    No, he doesn't realize anything ... he's not here to learn anything, he's here to piss us all off and to bask in the Donald-bashing.

    Nobody on the planet could be that stupid - so it has to be deliberate!

    Bring it on, Donald, I'm ready for you - give it your best shot!

    IanSForsyth likes this.

    favorite 1

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    DanHasLeftForum
    Members 4254 posts
    June 24, 2023, 11:09 p.m. June 24, 2023, 11:09 p.m.
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    @DonaldB has written:

    lets get this straight AGAIN. the incamera histogram represents at best, the raw file NOT the Jpeg. which part do you not understand ?

    That is total nonsense and you are again squirting words out of the wrong hole.

    I can guarantee you 100% that Sony engineers will also tell you your camera's histogram is not a raw histogram.

    For a given scene your camera's histogram will vary according to the WB and colour space settings you set which proves your camera's histogram cannot possibly be a raw histogram.

    People in this thread have shown you the flaws in your findings and logic. You choosing to not accept them does not make your logic and findings true 🙂

    Deleted likes this.

    favorite 1

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    Deleted Removed user
    June 24, 2023, 11:12 p.m. June 24, 2023, 11:12 p.m.
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    @DannoLeftForums has written:
    @DonaldB has written:

    lets get this straight AGAIN. the incamera histogram represents at best, the raw file NOT the Jpeg. which part do you not understand ?

    That is total nonsense and you are again squirting words out of the wrong hole.

    I can guarantee you 100% that Sony engineers will also tell you your camera's histogram is not a raw histogram.

    For a given scene your camera's histogram will vary according to the WB and colour space settings you set which proves your camera's histogram cannot possibly be a raw histogram.

    People in this thread have shown you the flaws in your findings and logic. You choosing to not accept them does not make your logic and findings true 🙂

    You're wasting your time, Danno.

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    JACS
    Members 878 posts
    June 24, 2023, 11:29 p.m. June 24, 2023, 11:29 p.m.
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    [deleted]

    IanSForsyth and Deleted like this.

    favorite 2

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    JimKasson
    Members 1738 posts
    June 24, 2023, 11:42 p.m. June 24, 2023, 11:42 p.m.
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    @DonaldB has written:

    16 bit converted raw read 250 250 250

    That's almost pure black!

    IanSForsyth, DannoLeftForums, ggbutcher and 3 other users like this.

    favorite 6

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    PeteW
    Members 184 posts
    June 25, 2023, 12:07 a.m. June 25, 2023, 12:07 a.m.
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    @DonaldB has written:

    cant wait for the guard dog to arrive 😁😜

    He's only a chihuahua, Don. Lots of snarling and repetitive barking. Thinks he is smart and tough but doesn't realize how stupid he appears.
    But he has pride of place on his owner's lap.
    DannoTheChihuahua.jpg

    DannoTheChihuahua.jpg

    JPG, 117.6 KB, uploaded by PeteW on June 25, 2023.

    DonaldB likes this.

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    Deleted Removed user
    June 25, 2023, 12:12 a.m. June 25, 2023, 12:12 a.m.
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    @PeteW has written:
    @DonaldB has written:

    cant wait for the guard dog to arrive 😁😜

    He's only a chihuahua, Don. Lots of snarling and repetitive barking. Thinks he is smart and tough but doesn't realize how stupid he appears.
    But he has pride of place on his owner's lap.

    Birds of a feather ...

    IanSForsyth likes this.

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    IliahBorg
    Members 976 posts
    June 25, 2023, 12:19 a.m. June 25, 2023, 12:19 a.m.
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    @DonaldB has written:

    just took an image of a white globe ceiling light. the 16 bit converted raw read 250 250 250 the jpeg was over 255 255 255

    You really don't understand. Interesting.

    IanSForsyth and Deleted like this.

    favorite 2

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    IliahBorg
    Members 976 posts
    June 25, 2023, 12:22 a.m. June 25, 2023, 12:22 a.m.
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    @DonaldB has written:

    63K03478.JPG

    This histogram shows clipping.

    IanSForsyth and Deleted like this.

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    Deleted Removed user
    June 25, 2023, 12:23 a.m. June 25, 2023, 12:23 a.m.
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    @DonaldB has written:

    ... the arm chair [theories] that have brought you all undone 😁

    On behalf of us all - screw you, idiot.

    IanSForsyth and TonyBeach like this.

    favorite 2

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    IliahBorg
    Members 976 posts
    June 25, 2023, 12:29 a.m. June 25, 2023, 12:29 a.m.
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    @JimKasson has written:
    @DonaldB has written:

    16 bit converted raw read 250 250 250

    That's almost pure black!

    @DonaldB has written:

    the jpeg was over 255 255 255

    But the JPEG was radiant!

    IanSForsyth, JimKasson and Deleted like this.

    favorite 3

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    Deleted Removed user
    June 25, 2023, 12:51 a.m. June 25, 2023, 12:51 a.m.
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    @IliahBorg has written:
    @JimKasson has written:
    @DonaldB has written:

    16 bit converted raw read 250 250 250

    That's almost pure black!

    @DonaldB has written:

    the jpeg was over 255 255 255

    But the JPEG was radiant!

    Yes, anything over 255 255 255 would be truly radiant in 8-bit terms .. whiter than white, eh?

    IanSForsyth and IliahBorg like this.

    favorite 2

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