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Re: Not understanding professional resolutions

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Kevin Cannon
Re: Not understanding professional resolutions
on Mar 5, 2011 at 7:55:51 pm

Check this out, it's a really comprehensive study by Arri about 2K and 4K systems used in motion picture with theatrical distribution:

One issue it covers is how close the audience has to sit to see a resolution difference between HD, 2K and 4K - a lot of people don't like to sit close that close (though the Arri study thinks that "limit of visual perception" is much higher than 4K, others disagree.)

A lot of other factors - bit depth, color accuracy, high quality image-processing, lack of artifacts, noise, or compression can be more important than resolution to the look of the final, and the Genesis, f23, f35, and Alexa tend to excel there more than "4K cameras"...

Also, there are no truly 4K or 5K cameras out there - the RED only gets to that resolution through post-process debayering. It's chip has a bayer-pattern sensor where each pixel of the image has only a Red, a Green, or a Blue photosite. Whereas the Genesis only has 1920 pixels in width, each one has a red, green, and blue photosite. So in terms of the actual photosites, there's not a large difference - obviously Panavision is disappointed that most people take RED's resolution claims at face value...

The Arri report concludes that the only way to really get 4K all the way through is shooting 35mm, but we'll see how things progress...


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