Thread: The P4K REALLY needs a 2560*1440, S16, 90fps capable mode

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  1. #21  
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    Quote Originally Posted by Fauxto View Post
    With the Demise of Cdng is almost unusable for most jobs and 2.5k would be a nice substitute

    And it seems like a downgrade with newer units seems impossible.
    Makes me quite nervous about our second unit arriving soon...
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  2. #22  
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    Quote Originally Posted by Robert Niessner View Post
    While I agree that it would be cool too have, I always find it fascinating how people without any inner knowledge of the device come the conclusion that a feature 'shouldn't be that difficult to implement'.
    My impression of BMD over the years is, that if something would have been easy to implement, they would have already done it. They are not restricting their cameras on purpose.
    Then this would be one of those things that BMD hasn't implemented despite it being easy. There's a reason why specs for image sensors tend to talk about frame rates and resolutions in terms of maximum's and recommendations and not in terms of finite modes. They provide the ability to mess with timings, do partial readouts, and go outside of recommended settings in order for the sensor in question to be used for as many different applications as possible.
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  3. #23  
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    Putting a sensor into a “window” mode is not always a simple FW change. First, the sensor needs to have the required window mode implemented in the sensor circuit, if a 2.5K (a non-standard resolution) window mode is not part of the sensor specification, then a simp,e FW update is not going to add this. UHD snd HD windows are standard on a 4K sensor in a Cine type camera, while UHD and APCS modes are normal on a DSLR sensor. Windows are based on native resolution needed, and are similar to variable aspect ratos, which a,so cha Ge the resolution/pixel could of the sensor area being used. The GH5S has a variable aspect ratio implemented on its sensor, but only one 16x9 (UHD window) area is available in UHD resolution. So if a 2.5K/S16 gate size window is not part of the sensor specification, BMD will not be able to implement this choice with FW, as this becomes a hardware issue.
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  4. #24  
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    Quote Originally Posted by Myownfriend View Post
    Then this would be one of those things that BMD hasn't implemented despite it being easy. There's a reason why specs for image sensors tend to talk about frame rates and resolutions in terms of maximum's and recommendations and not in terms of finite modes. They provide the ability to mess with timings, do partial readouts, and go outside of recommended settings in order for the sensor in question to be used for as many different applications as possible.
    Well, in 2013 I had written a feature request to BMD to implement a ProRes format of 2400 x 1350 px for the BMCC - the said they will look into it and it never happend.
    In 2016 I had written a feature request to BMD to implement a ProRes format of 2880 x 1620 px for the UM46k - the said they will look into it and it never happend.

    The UM46k does have several windowed modes implemented, while the PCC4k has only one.

    I guess it must have been less than easy to implement.
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  5. #25  
    Quote Originally Posted by Robert Niessner View Post
    Well, in 2013 I had written a feature request to BMD to implement a ProRes format of 2400 x 1350 px for the BMCC - the said they will look into it and it never happend.
    In 2016 I had written a feature request to BMD to implement a ProRes format of 2880 x 1620 px for the UM46k - the said they will look into it and it never happend.

    The UM46k does have several windowed modes implemented, while the PCC4k has only one.

    I guess it must have been less than easy to implement.
    I´d still like to see this 2440 x 1350 Mode coming to the original BMCC

    But yeah, those Cinemascope and/or windowed modes seem to be more difficult to integrate than one might expect.
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  6. #26  
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    Didn't BM already confirm that they intend to add a S16 mode to the camera? I seem to remember this being mentioned when the camera was introduced.

    In the meanwhile you can use s16 lenses by setting the safe area to 70% (1:85). I have a set of Zeiss Super Speed mk III and the 70% setting matches the coverage of the 9.5mm pretty much exactly. The 12, 16 and 25mm have partial or total coverage of the sensor, so you'll get a some extra pixels for stabilization and reframing before center cropping. I use an Odyssey 7Q+ as an external monitor and when I use the zoom function the area framed by the 70% markings basically fills the entire screen.


    Not an ideal solution, but it works
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  7. #27  
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    BM didn’t say they were going to add a S16/2K window, only, “look into it” which is their stock reply.
    BTW, the Pocket 4K has two windows, UHD/16:9 and HD, both only use part of the sensor. Full gate (whole sensor) is 4K DCS 17:9.
    Cheers
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