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Type: Posts; User: jrd

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  1. Replies
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    Sorry, what I'm seeking is access to the original...

    Sorry, what I'm seeking is access to the original files/frames, in their native formats.
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    It would fascinating to compare the uncorrected...

    It would fascinating to compare the uncorrected Alexa shots with the unconnected BMPCC 4K material. It would also prove to skeptics that the same results can't be achieved using other simpler means...
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    Are you sure you didn't reverse it -- "A" being...

    Are you sure you didn't reverse it -- "A" being extended video in the raw tab, and "B" representing the extended video LUT?

    Note that when you set the gamma to BMPCC 4K extended video in the raw...
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    How did you compare the color science of two not...

    How did you compare the color science of two not identical and non-normalized log clips? After downloading your stills and doing some very basic cc, you can see plainly that the light in the UMP...
  5. Of course. But that choice doesn't reflect the...

    Of course. But that choice doesn't reflect the claims that actual ISO settings in the camera (in log) can be exploited to advantage, depending on where you want to allocate the most data.

    What...
  6. But Zero Dark Thirty was Arri raw.... ISO...

    But Zero Dark Thirty was Arri raw.... ISO curves, allocating data above and below middle-grey wouldn't be applied (or baked in). Or would they? Is it anything more than a exposure choice -- that...
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    Not crazy, but maybe subject to operator error? ...

    Not crazy, but maybe subject to operator error? And you're not specifying how you're judging DR. After normalization? Grading? Are you transforming one image but not another?

    Anyway, I don't...
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    The DR is the same, or virtually the same. ...

    The DR is the same, or virtually the same. Prores may have more initial contrast because each ISO has a unique curve and maps white to a unique value, which is usually lower than 100%. Raw has...
  9. I can only give you my two cents: the ISO trick...

    I can only give you my two cents: the ISO trick is for still nature photography. If you've got an actual dramatic subject in the shot, like a face, that's what you expose for, and at an ISO setting...
  10. I gather John Hess is a photographer, which...

    I gather John Hess is a photographer, which accounts for the bizarre (for the video world) and needlessly confusing example he chose for those two cloud shots: ISO 1000 shutter speed 1/1000 versus...
  11. The only thing missing from the video is proof...

    The only thing missing from the video is proof that the strategy of shooting at ISO 1000 offers the advertised benefit -- one you can actually see in handling of highlights in real world shooting,...
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    BMD has warned (sorry, I don't remember where)...

    BMD has warned (sorry, I don't remember where) that the top mount isn't meant to sustain much strain. Baring the full weight of the camera on this attachment point could be risky. Hard to say.
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    At 23.976, the older Extreme Pro 64gb cards will...

    At 23.976, the older Extreme Pro 64gb cards will record 4K Prores HQ, UHD Prores HQ, and UHD raw 4:1, for varying amounts of time until dropping frames. For the less demanding formats, it can go...
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    I don't think the iphone gimbal performance (or a...

    I don't think the iphone gimbal performance (or a camera on tripod) tell us much about the physics of a moving rig weighing several pounds and with a front-weighted lens. All I can offer you is my...
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    I don't know about "shouldn't", but in practice,...

    I don't know about "shouldn't", but in practice, the more camera stabilization, lens and body, the smoother the footage.
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    Based on his sample footage, that youtubber isn't...

    Based on his sample footage, that youtubber isn't skilled at it. The stuff about keeping it close to (or locked to? he's not clear ) the body is questionable.

    It's only a matter of time before a...
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    Dream on. The operator, not the gimbal, reduces...

    Dream on. The operator, not the gimbal, reduces the bounce.
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    There's no such thing as a raw waveform. The raw...

    There's no such thing as a raw waveform. The raw file was either converted to log or rec. 709 (or other display standard), depending on your settings. in the raw tab. Which is it? I don't think the...
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    It looks like you need a slightly greater offset,...

    It looks like you need a slightly greater offset, since even the 2nd one is still a bit low, assuming you're shooting log. There's no clipping, that's just the grid line.
    You can use the BMPCC 4K's...
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    No need to change anything? Consider that 1)...

    No need to change anything? Consider that

    1) digital camera manufacturers have very different ideas of what any given ISO actually means;

    2) light meters are calibrated for t-stops, not...
  21. You can say that again.... If nothing else,...

    You can say that again.... If nothing else, greater clarity might reduce the intensity of the disagreements in places like this.

    OTOH, with all due respect for what BMD is doing, sometimes the...
  22. I don't see any difference either. 1600 levels...

    I don't see any difference either. 1600 levels fall where you'd expect, between 1250 and 2000, and there's no change in clipping level.
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    Somebody *finally* posts simple and reliable...

    Somebody *finally* posts simple and reliable tests, which could actually inform how best to approach the camera at its most basic, and you guys can't stop dumping on him?

    I guess it's back to...
  24. If you don't need to test anything, then there's...

    If you don't need to test anything, then there's no point in me trying to persuade you that you're mistaken about the function and operation of ISO settings on this camera, and other digital cameras....
  25. No. If you want to make your life simple, shoot...

    No. If you want to make your life simple, shoot at nothing but 400, for the 100-1000 ISO circuit. For the low-light 1250-25600 circuit, you could use 1250 for relatively well lit scenes, and 3200...
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