I'd go Bolex before BM but I'd go A7s before either of those and if your budget allowed I'd go F5 before A7s, but only just. F5 and A7s are so close in image quality its crazy. That goes for the F55 too because it has the same image as the F5.
This is a crock.
Consumers are not demanding it!! Thats just BS. 4K is just another marketing push.
Have a look around, the only camera manufacturers going hard on 4K are the TV manufacturers. Sony, Panasonic, now Samsung. Sure there were 4K cameras before this TV push but they were there for different reasons.
Most consumers don't know about 4K let alone give a crap about 4K.
On a 50inch screen you can't see 4K past 5 1/2 feet and I don't believe consumers really want 80 inch TVs in order to see the difference.
One BIG thing to keep in mind in every 4K display has very slow moving or static images to show the difference... Nobody seems to be commenting on this but it only takes a small amount of movement to introduce enough motion blur to nullify any increased resolution 4K has over HD.
To me the much higher data rates for broadcast and our own workflows combined with minimal improvement and interest make this batshit crazy.
I want them to do well but how can they think the black levels of the video they released is acceptable is a worry.
Its not significantly better. I'm yet to see any footage shot on the F55 that I don't believe would have looked exactly the same on the F5.
Sony have never published the actual colour gamut of the F5 because they don't want people seeing how close they are.
They may even be exactly the same...