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Shenan

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Posts posted by Shenan

  1. 1 hour ago, tugela said:

    No. All that is required is next generation silicon with lower power requirements. Panasonic apparently have one of the most advanced processors in any camera (except perhaps the one in the NX1) in the GH4, and that is two years older now. They likely have more modern components now with lower power requirements (which consequently can be pushed more and remain in an acceptable operating thermal envelope).

    The big heat source would be the processor, not the imager. I think that all of the manufacturers can shoot 4K60p with the sensors they have, they just can't do it without melting down their processors (unless they do a software solution like Canon).

    A rumor from July said that the GH5 processor would be "a new very powerful processor engine" and that that's how it would obtain IQ gains. Although the same rumor says the sensor would be 99% like the GX80/85. :\

    http://www.43rumors.com/ft5-panasonic-gh5/

  2. 1 hour ago, MattH said:

    Amount of rolling shutter, quality of interframe compression (or lack of ideally).  They effect the perception of motion in video.

    There are other factors too, like "penumbral sweep" that affect motion rendering characteristics:

    http://nofilmschool.com/2010/09/the-red-report-adam-wilt-on-epic-hdr-and-the-future-of-cinemaphotography

    http://nofilmschool.com/2011/06/tessives-time-filter-brings-films-dreamy

     

  3. 54 minutes ago, The Chris said:

    Bollocks, the a7rII doesn't overheat at all. Not in 4k and certainly not in 1080p. 

    I've never used one, but perhaps you haven't run into it because you don't record very long clips? Perhaps only some units suffer from it, or perhaps a firmware update improved it since the original release?

    A quick search turned up several reviews indicating overheating. Gizmodo mentions overheating in an air-conditioned room at around 45 minutes. B&H and newsshooter mention it but don't give time figures. This link mentions about 15-20 minutes for A7RII and 50 minutes for A7SII: http://www.4kshooters.net/2015/12/08/is-the-sony-a7s-ii-overheating-a-real-issue/

  4. 12 minutes ago, markr041 said:

    Hogwash. The GX85 has IBIS in 4K, no extra crop when using IBIS, and no 30 minute limit. And it is much smaller than the GH4. It does not overheat, ever. In fact, Panasonic engineers have revealed that one of the reasons the GX85 is so heavy given its size is that there is a massive heatsink inside.

    No need to call me a hog. :) But I stand corrected then. The B&H specs for it say a time limit of 29:59, but I now see that someone posted on dpreview that they personally tested up to about 1h 30m on 4k and IBIS. Impressive! I guess they've already made the engineering breakthrough I was imagining. Any links for the engineers talking about the heatsink? I would like know more about what they did.

    Sanveer, you may be right that it was a design flaw with previous cameras. It's just curious that no one had solved it before.

    I'm curious about what they're going to do with all the processing power that they're planning to add (according to a previous rumor). H.265 would be one of the possibilities, but hopefully other goodies as well. Anyway, I think I need to start saving my pennies for this camera...

  5. 2 minutes ago, mercer said:

    Idk, if the GH5 doesn't have IBIS, then this thread will turn into the current 5d threads and all the detractors will appear. It HAS to have IBIS. But you may be right that it can't have it all... So most likely the unlimited time will be axed.

    I don't think it would be that bad. The GH5 would still have a lot more video-friendly features and abilities than the 5D4. I hope they choose recording time and high frame rates over IBIS, but we will see. If they axe the unlimited time it gives me more options. My two top requests for cameras are: 1 - headphone jack (of course with a mic jack to go along with it), 2 - unlimited record time. Very few DSLR-type cameras have (1), and only the GH4 (as far as I recall) has (2). Those are two big factors that make it so effective, really the best stills/video hybrid ever.

  6. I meant to make this comment on the last news post about the GH5 but didn't get around to it...

    I want to throw some water(?) on the idea that Panasonic will include the GX80/85 IBIS on the GH5. I think there's a lot of potential for disappointment if you expect this. I can't think of any camera right now with a large sensor, 4k, and IBIS that doesn't come with a recording time limit, and often with overheating issues even before reaching that time limit. The reason, from what I understand, is that as soon as you introduce IBIS you can no longer attach the sensor to a large enough heat sink because it would be too difficult (impossible?) to move the whole combination as is required with IBIS. Realize that IBIS would also limit their ability to produce high frame rates, for the same reason (sensor overheating). The GX80/85 has that great IBIS but also has a max frame rate of 60P and a max recording time of 30 minutes.

    Engineering involves balancing many factors. Unless Panasonic has come up with some engineering breakthrough that would allow a combination of large sensor, 4k, IBIS, high frame rates, and no time limits (which I think is a very unlikely combination), I, for one, would choose unlimited record times over both IBIS and high frame rates. I think that unlimited recording time is one of the really special features of the GH4, and one of the main factors that would make me choose it over any of the competitors. If they do away with that, it would open up a lot of (competitor) options for me.

    Oh, one more thing... I haven't yet seen any good reasons for them to change the body design from the GH3&GH4 -> GH5. Hopefully Panasonic realizes that they would do better to build on top of what they already have, rather than start from scratch and obsolete a lot of accessories.

  7. Hi Andrew, I just registered in order to ask this question:

     

    In your opinion, is the video on the A7R better than the 5d Mk3 WITHOUT magic lantern raw, in other words, stock? If so, how much? I think a lot of people would be interested in shooting full-frame video on this if it gives decent/usable quality without having to mess with raw.

     

    Thanks!

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