Lowepost

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Insider article Comments posted by Lowepost

  1. Thanks for your kind words Julien!

    You do not have to bring your PFE LUT into a color managed environment to make the reference. Simply add the LUT to a Grey Scale with no color transforms applied at all, and the result you see on the Waveform will be what you want to recreate. Save a still so that you have a reference.

    Then you'll have to set up your color managed workflow with the transform curve you want, and project it onto the Waveform. From there on you can use your reference still and the curve operator to make an "offset" that basically will be the difference between your reference and the color managed display curve.

  2. 2 minutes ago, Stan Allende said:

    On those links I only see how you powered the IDX mount and the DXA RED, not the ZCAM itself... am I missing something?

    We used the cable between the ZCAM and the IDX-mount, and the battery attached to the IDX-mount powered the camera. 

    • Thanks 1
  3. On 8/22/2022 at 2:35 PM, Stan Allende said:

    Great Rig.
    I was wondering which cable are you using to power the camera? I bought the Alvin's cables Zcam E2 Camera Power Cable 4-pin angle to D-Tap but it doesn't fit with the Zback (the cable is in the way of the cage). I see there is one right angled, maybe that one is the way to go? 

    Hi Stan, thanks! Have a look at the cable link below the "cable management" section, that's the one we used.

  4. 58 minutes ago, Jonathan Martin said:

    This is a very naive question – apologies in advance... But what would be the correct way to apply this method to color correcting flat/log film scans, in terms of colour management in Resolve? What would you select as input and output gammas?

    In Resolve YRGB Color Management set the input to you camera and output to rec709 2.4, and the printer lights will be applied in camera space (log).

    • Like 1
  5. 6 hours ago, Fady melek said:

    It would be great to discuss if QT and DNX files are expected to be full range or legal range or both. There has been a long debate about proress 444 being full or legal or both. Also different systems render out prores differently. I was told by baselight team that all prores are expected to be legal. However, i heared davinci renders prores 4444  as full range.

    Challenge accepted.

  6. You basically answered your own question. Printer point corrections for film affect the whole image with no separation of lift, gamma or gain. There are ways to adjust "lift" or black levels and "gain" in the photo chemical process by using flashing techniques, different print stocks or film processing adjustments but this would be a global correction to a full roll of film and would be difficult to apply shot by shot.

    Jim Passon

  7. 8 hours ago, Nicolas Hanson said:

    Hi Jim, thank you for this introduction to color timing. Is it possible to affect only lift, gamma, or gain with printer points?

    It is possible to apply a simulated 50 printer point scale to the lift, gamma and gain controls in digital grading but this would not be the same as printer point corrections on film where there is no separation for lift, gamma and gain, only density and color balance. 

    Jim Passon

  8. That is an interesting question @Aldo Barba!

    Since the Lut usually starts with a film type emulation (or not if it is designed to go either before or after an existing lut) any of the properties, i.e, negative tone scale, print tone scale, color contrast (degree of saturation), gamma, system color matrix, display characteristics, etc. are able to be changed. Also, targeted color space within the cube can be altered, i.e., if the XYZ of a certain area (possibly a red area of an apple) is targeted one might choose to replace the output of the cube with a different color, maybe making the apple green or maybe just neutral.

    One creative lut i did for my colorist daughter Jill while she was working on The Grand Budapest Hotel was used in a scene in the beginning of the movie to impart a Technicolor 2-strip type of look. This was a bit more involved, but it allowed her to color fine tune without using the color corrector software. Avoids some artifacts if the software is driven too hard.

    Other luts that are creative can be created via a mathematical transform (if you know what you want in math terms) or statistical (if you can use regression techniques etc. to alter the lut) transform.

    Bottom line .....  in the creative world anything goes. No common ground .... except the direction of the cinematographer to the colorist ..... Make it look like this !!!

    Cheers Mitch