Thread: The Pocket 4K has half a stop more DR than the old Pocket

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  1. #1 The Pocket 4K has half a stop more DR than the old Pocket 
    Senior Member Fauxto's Avatar
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    It also states that it has 0,9 stops more DR than the GH5s @400iso, but @3200 the Pocket loses one stop and the GH5s doesn't so at low light they have similar DR. That puts the Pocket 4K almost on par with the FS7, which is pretty amazing.

    By Cinema 5D, around minute 13:


    pocket 4k DR.jpg
    Last edited by Fauxto; 10-29-2018 at 02:04 PM.
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  2. #2  
    Lovely !

    And who knows if BM can squeeze a tiny bit more DR with BRAW ? Either way, it already has enough DR for being an indie movie sensation.
    Pocket 4K "Chaplin".
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  3. #3  
    Senior Member Fauxto's Avatar
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    If BRAW cleans a bit the shadows I guess the results could be a bit better, yes.
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    Senior Member shijan's Avatar
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    Those are very strange measurements. Why P4K chart with two clipped highlights compared to non clipped Sony/Panasonic? If they adjust charts by middle grey it shows exact that most people noticed - highlights dynamic range is very poor, but shadows feels cleaner but actually just filled with fake light. Effect similar to Tiffen Ultra Contrast filter. Probably this is BSI sensors nature and "look"
    Last edited by shijan; 10-29-2018 at 02:47 PM.
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  5. #5  
    Senior Member Fauxto's Avatar
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    DR is DR. You can place the middle grey where you want with Iso or grading. Just use 800 ISO and you'll have one stop more in the highlights.
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    Senior Member Taikonaut's Avatar
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    BRaw on the UMPro is said to have gain 2-2.5 stops in the shadow so P4k may gain about 2 stops in the shadow. BRaw should benefit low light.
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  7. #7  
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    Quote Originally Posted by shijan View Post
    highlights dynamic range is very poor
    Not really a thing. As Fauxto pointed out, DR is DR. The middle grey point is determined by the ISOs on this camera.
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  8. #8  
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    Quote Originally Posted by shijan View Post
    Those are very strange measurements. Why P4K chart with two clipped highlights compared to non clipped Sony/Panasonic? If they adjust charts by middle grey it shows exact that most people noticed - highlights dynamic range is very poor, but shadows feels cleaner but actually just filled with fake light. Effect similar to Tiffen Ultra Contrast filter. Probably this is BSI sensors nature and "look"
    The first two are clipped on all of them. The log curve often is made to capture more than the cameras actually can for future proofing. S-Log is the same on all Sony cameras but some have more DR than others.
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  9. #9  
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    Interesting when asked about Raw dynamic range it looks like the P4K is already using part of the new Braw features.

    "The Pocket Cinema Camera 4K uses our new demosaic algorithm developed with Blackmagic RAW, before encoding to ProRes. This new algorithm helps to reduce noise and improve the dynamic range in ProRes capture. With Cinema DNG RAW, the demosaic is still performed in DaVinci Resolve. That enables full control and manipulation over debayer settings, noise reduction, and highlight recovery to increase the dynamic range measurement beyond that of ProRes.

    By applying minimal temporal noise reduction to the Cinema DNG RAW files in DaVinci Resolve - the lower steps on the waveform can be cleaned up nicely, bringing the available dynamic range of RAW in line with those seen in your ProRes tests. Then by enabling highlight recovery, the available dynamic range in Cinema DNG RAW increases beyond that of ProRes.

    ProRes users benefit from the new debayer algorithm in terms of dynamic range and reduced noise at capture, resulting in a faster turnaround.
    RAW users benefit from the full control and manipulation of the image, to decide which parameters they would like to tweak and finesse."
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  10. #10  
    Senior Member shijan's Avatar
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    Quote Originally Posted by RyLo View Post
    The first two are clipped on all of them. The log curve often is made to capture more than the cameras actually can for future proofing. S-Log is the same on all Sony cameras but some have more DR than others.
    Just check values with Color picker.
    P4K patches left to right: 255, 255, 226
    Sony patches: 180 168 147
    They just cut 2 stops of dynamic range from Sony for unknown reason.

    This is some kind of strange dirty marketing dynamic range measure. From P4K footage never feels like outperforms older cameras in dynamic range. It looks sharper and with less moire, but always have that fake DSLRish "slightly not enough dynamic range to look like real film" feel.

    This is like samples from other thread, where two frames shoot with P4K and BMPCC, but P4K overexposed almost 2 stops compare to BMPCC and calm that p4K shadows are cleaner. The funny thing that even with 2 stops underexposed BMPCC with recovered shadows in post looks almost same as P4K already exposed 2 stops higher and downscaled from 4K to HD.




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