Maybe it's time to look towards a different camera.
You can't expect a dump truck to fly no matter how long a solution takes, Re: "Might need a firmware update though." and 4K really isn't 4K if it goes into crop mode Re: "Involves 10% crop".
Well thought out and documented points brought up here but in the end It might be time to grasp that you can't plow 20 acres with a butter knife if "4K, 120, 4.2.2 can't be compromised" and find a different device to get you to where you need to b
@Pieter: quite to the contrary. I took the initial statement of the TO, that he "can't compromise on that" at face value. The very notion of "no compromise" doesn't lend itself to any - well - compromise. 😉
I pointed out, and backed this with quotes from Sony's original documentation, that Sony
admits to compromising in the question of "full 4K" already
is inconsistent about its claim the A7S3 can do 120fps at all. One could have expected, that such a main feature would have
Your reply in no way answers OP's questions @Chrissie. You're raising all kinds of arguments against the use of 4k120p that may be totally irrelevant to OP:
The maximum bitrate at 4k/120p 10 bit 4:2:2 is 280 Mbit/s or 35 MB/s (H.265 XAVC HS codec). A 160 GB card can record 4571 seconds at this bitrate, or 1h:16min. This is a much lower bitrate than 4k/60p 16 bit (600 Mbit/s), so I don't see why an external recorder couldn't handle this. Might need a firmware update though.
I think you'll have to learn reading the fine print, and not to believe all hearsay or marketing hype.
For instance: Sony itself claims the
involves a "10% crop". (Click on the "6" footnote at the end of that heading). It's up to anyone's guess wether that is a 10 % crop at the overall pixel count, of if it's applied to both width and height of the image. In the latter case, that would amount to a 19% loss already.
The same sources quotes the
via HDMI at a maximum of 60f