Originally Posted by Cinema626
I mean... It's just a fact. That is spec. It doesn't resolve 8k. But it is 8k in the sense that red is 5k. I saw the dynamic range with my own eyes in the color suite. There are about 15 stops which could be deemed usable but for kicks we were able to push it more (don't expect to see that in a film, but the information IS there). It can do up to 120 fps in true 4k downsampled from 8k. In the future it will be interesting to see how far they can push the sensor. I suspect approaching 5k.
It is not facts.
You are just repeating Sony "hyperbole".
The "8K" specs of the F65 is just Sony marketing hype, or rather call it "creative counting".
"Smart move" from Sony, as people all over now is indiscriminately repeating the marketing hype.
General resolution for 8K is 8192x4320=35MP (DCI cinema specs but not yet standardized) or 7680x4320=33MP (8K TV/Broadcast format).How does Sony reach their "8K" number.
They have a CMOS sensor with 20 million photosites. The rows of photosites on the sensor is turned 45 degrees. The aspect ratio of the sensor is 1.88:1.
The sensor has double set of green photosites compared to normal CMOS sensors, But this is only in the horizontal rows.
So; The horizontal rows has 4000 Green photosites + 2000 Red + 2000 Blue = 8000! ~ aka "8K".The sensor does not have the equal double set of green vertical.
Normal pixel counting of any sensor to tell the pixel resolution would not count the double set of green photosites as more than single photosite as they do not contribute much, if any, to the resolution and resolving power of the sensor. Particularly when the double set of photosites of one color is not repeated both horizontal and vertical.
The double Green set of photosites in the Sony sensor does only contribute to a better reproduction of Green color. That's why Sony has made the sensor that way.
This camera uses a 17.6 million photosites crop of the sensor to record image output (this is normal), If
we incorporate all the green photosites in the measure.
If we count the double green as one photosite, the resolution measure will be much lower and will be on par with the Red MX sensor in the Epic-X camera.
Based on the numbers above, people can themselves calculate the conventional resolution of the Sony F65 camera.
The Sony F65 sensor is subsampled in camera to 4K output even in RAW (it can not record the sensors full resolution like the Red cameras.
The Red Epic does not subsample the 5K sensor resolution in camera. That is done in post.
This is one of the main differences between Red cameras and cameras like F65 and Alexa, neither which can record RAW in camera but needs an expensive ($30000?) external recorder to record RAW. Also one of the reasons why those cameras are so much larger and heavier than the Red cameras.
It is true that no camera have the resolve power of their sensor resolution measured on a Zone chart. That is why they record at a higher resolution than the intended output resolution. That is also why 2K cameras or 2K film scans does not resolve full HD.
There is no difference between cameras based on this, only difference is how they subsample from higher sensor resolution to intended output resolution.
The F65 surely records good quality images, but is not exactly an impressive piece of innovative engineering like the Red cameras.
It is surprising that Sony uses this kind "marketing hyperbole" (even thought that is typical Sony) when presenting professional equipment, but it is more worrying that professional "camera gearheads" keep repeating the "8K" hype from Sony rather than calling them out on it.