Thu Oct 15, 2020 11:22 pm
A few things about how to use the Ursa, that neither Epic media nor Armando Ferreira might be realizing when they did their tests:
1. Diffraction with 12k res on a s35-sized sensor starts at F/4.
2. Diffraction with 8k res on a s35-sized sensor starts at F/5.6.
This means that to properly do a test with an Ursa, you need to use a lens that's sharp between f/2 and f/4, and VERY FEW such lenses exist. The Sigma EF 40mm is one of the few of these that can resolve 12k at the required aperture speeds. Please note, just because you used an expensive cinema lens, doesn't mean that that lens can resolve 12k. Many cinema lenses were made to resolve 4k, at best, even the super expensive ones. You need a sharp, photography lens to properly test 12k, since photography lenses have traditionally put more design effort into sharpness than cinema lenses.
In other words, if you want to make use of this 12k camera, you need specific lenses. The vast majority of them won't do. That's something people need to factor in the cost of the camera.
3. The moire problem could be because of the downscaling on-screen, or on youtube, or when exporting as 8k from 12k. If that's the case, then seeing the moire is normal DEPENDING which downscaling algorithm the video editor is using. Have they told us in their review if the moire exists when seeing the footage zoomed in at 1:1 on their monitor? If no, then it's a downscaling issue, and not a camera issue.
4. Still bouts of IR pollution on the footage (look at the guy's black shirt, on Armando's video). I don't understand why after all these years, BMD puts such weak IR+UV filters on their cameras. You'd think that they've learned by now.
5. The colors to me looked exactly as if they came out of a Sony sensor. I know that BMD said that they designed this 12k sensor, but to me, the color looked exactly the same as before (as if it's using the same design and CFA filters). Canon produced more matte, muted colors that are to my liking, and closer to kodak film and ARRI.
Collage artist, illustrator, filmmaker: https://vimeo.com/eugenia