Anyone seen footage from sony F65?

[Tom.Wong]

Can you be more specific about this? I thought 120fps was only 2K? Is there any line skipping? Any other tricks to achieve this 120fps? Are you saying only widescreen 120fps? What speeds can the full sensor achieve?

For 120fps is the entire sensor pattern being recorded, or is some information being discarded?

at the f65 workshop i was at, a sony engineer claimed, and claimed very strong. 120 fps, in 4k. which just a loss in horizontal resolution, top and bottom. but it will still be 4k worth of resolution, with just an adjusted aspect. they will not be doing any windowing at all, or add any additional compression to achieve it.

and there is a 1080p mode just activated recently that records to SR codec, that is a full scale down. not sure about the FPS you can get on that, but there is no line skipping, windowing of the sensor of any kind. i'm sure it sacrifices a lot of higher framerates, but it's a complete down sample into 1080.


the way the sensor reads out is that it reads out from 4 quadrants independently reading that reading out the whole sensor, at once or one line at a time. so each quadrant literally has it's own set processing to get that info off fast, and all 4 pieces get re assembled when it hits the card. again, the camera really is no slouch. it's a fat camera, but it does produce a competitive image and quality. again, competition is a good thing, i'm sure Dragon is gonna be insane too. I hear Arri is coming out with a 4k cam soon, those are just rumors though but it's a inevitable thing. It's gonna be a very competitive era in digital acquisition.

[Tom Lowe]

at the f65 workshop i was at, a sony engineer claimed, and claimed very strong. 120 fps, in 4k. which just a loss in horizontal resolution, top and bottom. but it will still be 4k worth of resolution, with just an adjusted aspect. they will not be doing any windowing at all, or add any additional compression to achieve it.

and there is a 1080p mode just activated recently that records to SR codec, that is a full scale down. not sure about the FPS you can get on that, but there is no line skipping, windowing of the sensor of any kind. i'm sure it sacrifices a lot of higher framerates, but it's a complete down sample into 1080.


the way the sensor reads out is that it reads out from 4 quadrants independently reading that reading out the whole sensor, at once or one line at a time. so each quadrant literally has it's own set processing to get that info off fast, and all 4 pieces get re assembled when it hits the card. again, the camera really is no slouch. it's a fat camera, but it does produce a competitive image and quality. again, competition is a good thing, i'm sure Dragon is gonna be insane too. I hear Arri is coming out with a 4k cam soon, those are just rumors though but it's a inevitable thing. It's gonna be a very competitive era in digital acquisition.

You are preaching to choir with the statements about the camera being no slouch, competition being a good thing, etc. Hope you did not get the impression that I am down the camera. I am not.

Now in terms of 4K 120fps, my questions would be: 1) what aspect ratio 2) will any information be discarded, and if so, will this prevent the footage from some day being demosaiced to 8K, like the standard F65 4K footage will be some day?

[Tom.Wong]

i forgot what the aspect ratio would be, that's something that will be confirmed when the feature is actually activated. it is still under a lot of testing and this could change.

from what I understand. the RAW is already "8k" but when you access and look at the footage the demosaic is only showing you the image in 4k. it's another slated to be activated feature to view it at its full resolution. so if you can shoot 120 fps, it stands to reason that if it's an 8k sensor, and they claim no windowing on the sensor itself, there will be no drop in resolution other than the horizontal crop. and thus you are really recording 8k at 120 fps.

not trying to preach, I just don't want this thread to get flamed up, since topics like this in the past, have derailed so fast, it's hard to have any interesting convos on these boards sometimes.

[Domenic Barbero]

Has anyone had to match sony and RED footage together in the past? like epic and f3 or anything like that. Are they noticeably different in a 1080 export or is the color matching fairly easy? I always enjoy sony footage. Well im never unsatisfied with it i should say. I wonder what big productions would be using as a b cam if the f65 was A cam

[Tom Lowe]

from what I understand. the RAW is already "8k" but when you access and look at the footage the demosaic is only showing you the image in 4k. it's another slated to be activated feature to view it at its full resolution. so if you can shoot 120 fps, it stands to reason that if it's an 8k sensor, and they claim no windowing on the sensor itself, there will be no drop in resolution other than the horizontal crop. and thus you are really recording 8k at 120 fps.

Assuming that no pixels are skipped and that no information is being discarded. Something about this seems strange to me. If you can crop the sensor by some percentage and get 120 fps, why could you not get 80fps or 90fps with the full height of the sensor? Are the number of pixels literally being cut in half when recording 120fps? If so, how is that not a huge loss in resolution down from 8K? The sensor is already fairly wide aspect ratio to begin with. Is there some kind of pixel-shifting going on? What am I missing here?

[Subhadip Sen]

If I am not mistaken, the F65 pixel array is 8K x 2K, i.e. only the horizontal pixels are doubled. For true 8K you would need 8K x 4K. They would probably have some demosaic / interpolation algorithm which would resolve images to well over 4K though.

[Jannard]

We think the Sony F65 is great. Really. It finally validates everything we have said for 6 years. 1080P is not enough.

Jim

[Chuck Z]

One of the Vimeo videos of F65 footage has posted TIFF stills. Unfortunately, I saw some nasty compression in one or two shots even though I was assured the footage was shot RAW and not in SR.

[Zakaree Sandberg]

it looks great. super legit..

also a boat anchor

[Justin O'Neill]

Sony does "stair step" counting to get the 8k horizontal pixels so my guess is they are throwing out half of those pixels to get to 120fps at 4k.