Jump to content


  • Posts

  • Joined

  • Last visited

Posts posted by Vesku

  1. 21 hours ago, jonpais said:

    Panasonic does not even offer 8-bit HLG.


    15 hours ago, Dan Wake said:

    which camera offer hlg 8 or 10 bit? thx

    Panasonic GH5 actually can shoot 8 bit HLG 4k 30P when using a special trick. I think it is a bug which allows 8 bit HLG but only in 30P.

    When I save 4k 60P in C-memory and then select record mode HEVC the camera uses h.264 8bit 4k 30P 100Mbs but allows HLG.

  2. 59 minutes ago, jonpais said:

    Did you even watch the video I just posted?

    I have seen it days before and this video shows identical DR for GH5S/GH5. 

    Counting monitor nits is not relevant for captured DR. A SDR monitor can show whatever captured DR when shades are compressed/graded visible. An HDR photo can have 20 stops of DR and we can see details in highlights and shadows in rec709 display. 

  3. 7 minutes ago, jonpais said:

    ...there appears to be a considerable difference in brightness, particularly at lower ISOs, between the GH5s and the GH5. I think it's also worth repeating that Panasonic ISO 6400 is not equivalent to Sony ISO 6400 - Panasonic overstates their ISOs, and there are as many as half a dozen different ways manufacturers come up with these numbers.

    Is the GH5S brighter or darker at same exposure and iso than GH5 or Sony?

    The new Star Wars movie in 4k theater has added noise which looks like GH5 iso1600-3200.

  4. I have not seen any GH5s video shoving more DR than GH5 when using lower than iso3200. Also I dont see any difference in DR GH5s iso2500/iso3200.

    GH5 base iso is 160, GH5 200. Maybe their actual iso readings are not comparable. In DXOMARK test GH5 actual true iso is much lower than GH5 indicated iso in screen.

    Is the GH5s image brighter with same exposure/iso than GH5?



    From Slashcam: https://www.slashcam.de/artikel/News/Panasonic-GH5s---Die-Unterschiede-zur-GH5-am-Vorserienmodell-naeher-betrachtet--Bildqualitaet---Tendenzen-des-Vo.html

    "Although the sensor only offers a 1: 1 readout due to the size of the sensor, the first impressions of the debayering look very cinematic: the finest details are clearly filtered, which accommodates the typical cine look and covers most debayering problems in a 1: 1 readout. So no chroma streaks and no zipper artifacts like many competitors. The clean 4K sharpness of the GH5, of course, can not be achieved due to oversampling due to additional pixels"


    GH5 seems cleaner in low iso.


  6. I watched the new Star Wars in big premium theater with Barcos newest 4k laser projector. The projected image was quite bright but the contrast was poor. The black level was "gray" and colors has no vivid DCI-P3 look. My rec709 TV has better contrast and more vivid colors. The theater has  very black interior so the poor black level comes from projector. Surprisingly the 4k image quality was also noisy, something like GH5 iso3200 look. I think they have added tons of film grain because the IQ cant be so noisy otherwise. It may be some kind of retro thing.

    Dolby Atmos was good but very loud. Explosions sounded realistic and my fingers went to my ears automatically in some scenes. Everything was too loud and the otherwise pure and good sound distorted in my ears. Even dialogues was unpleasant and hard.


  7. 1 hour ago, sondreg said:

    Take contrast ratios in displays with a grain of salt. The thing that makes a difference are the amount of nits.

    Yes it is the thing I wonder when cinema has only 48nits and gray blacks but still huge color space and DR?

  8. i found a very good article about all possible color spaces:


    It has an interesting table of contrast ratios. Is it true that in cinema we can see 11-13 stops DR and larger color gamut than with a good vivid TV? In my experience the image in cinema is normally faint and low contrast compared to bright TV. A cinema standard for pure white is only 48nits.

    It is also a surprise that film negative and film projection has very large DR (15 stops). My experience in not confirming that either.



  • Create New...