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Posts posted by androidlad

  1. 39 minutes ago, Django said:

    Hmm.. so now he's actually advising people to ignore the overheating tests. The plot thickens..



    This was tested in Florida under direct outdoor sunlight with ambient temperature of over 38C.

    A7S III lasted 23min shooting 4K60

    R5 lasted 34min shooting 4K30 HQ.

  2. 3 minutes ago, Jay60p said:

    Then would you agree that in general a 12MP camera (with more moire/aliasing) usually results in a softer image than the

    26MP 6K oversampling cameras for 4K video, DR being equal?

    Yes, with Bayer sensors, 1:1 readout is always softer than oversampled readout. Strong OLPF that combats moire can make it even softer.

  3. 1 minute ago, Jay60p said:

    So there is no oversampling for 4K. How could this match the IQ of the X-T3/4 and all the other 24-26 megapixel cameras for 4K video?

    My X-T3 is oversampling from 6K to 4K.  Seems to me the 422 or 16 bit raw wouldn't matter much if the lack of oversampling results in a softer

    image.  Or is this new 12 megapixel sensor a major new technology?

    Oversampling minimises moire/aliasing, it does not directly correlate to better DR.

  4. 8 hours ago, Andrew Reid said:

    BS maybe.

    "In-sensor scaling" = pixel binning or oversampling...That is the question. Because binning, skipping, implies you are not sampling all the data, but with averaging and combining data from all photosites, the story is very different.

    I am curious how the 12K RAW stuff does not infringe on RED's patents BTW.

    Changing the CFA is enough?

    I doubt that.

    Well put.


  5. BMD patent document on the URSA 12K sensor design:



    Actual CFA pattern:



    In the document, it specifically discusses colour-aware pixel-binning to increase sensitivity and double framerate, at the expense of lower resolutions. So the "oversampling" mentioned in marketing is without doubt BS, at least for full FOV framerates higher than 60fps.

    Because if it oversamples from full 12K, then the oversampled modes cannot exceed 60fps which is the full readout max fps.

    Maybe there's a feature similar to R5's "4K HQ" mode.

  6. This is the CFA pattern of the URSA 12K sensor:


    6x6 block instead of traditional 2x2, 18 RGB pixels and 18 white/transparent pixels, which improves SNR a bit but reduces resolution.

    So the optimal shooting mode will be 4K (full RGB info without interpolation from 3x3 pixel-binning), 8K will be softer, 12K 1:1 will be very very soft.


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