Moire or noise on the BMCC

Hello,

I just found this testvideo:


I have not seen any such issues on "Meet me in Big Sur" and other films.

Having an unfulfilled order for 1 BMCC and 1 BMPC 4k I wonder is this test showing actual problems with color moire on the BMCC?
Or is this test flawed in any way?

Do you suggest a special Noise reduction and/or Moire reduction in Resolve?

Thank you.

helps a lot.

Left is before, right is after:

I think I turned the noise reduction up to 17 in this clip.

The BMCC does suffer from moire. I recently did a test with:
Nikon D800
NEX-FS100
BMCC EF

All with the same lens.

Moire was visible in both the D800 and BMCC.

Using the above technique does help. I'll be posting my tests over the weekend.

Moiré is the dark side of the greater sharpness and finer details we enjoy in BMCC footage; as long as bayer pattern sensors are involved you always have to compromise between moiré and crispness. Noise is a completely different, yet related issue, as it depends on the size of the sensor - the larger canon sensor has a huge advantage here. Both issues can be reduced by software, trading in some detail and resolution for the cleaner images.

Meet Me In Big Sur certainly did have moire, but you're not noticing it because 1. those bits that cause moire to happen weren't taking up large portions of the screen like a fence, 2. all those trees and breaking waves were way off in the distance so the moire was very fine. Don't think you can shoot something that looks like that piece just because you have the same camera. That guy that shot that? That's pretty much all he does is shoot those kinds of videos of landscapes. The people mucking about within those landscapes are always secondary. Before the BMCC he had quite a bit of experience shooting similar shorts with DSLR's.

Glad my video was helpful. In Resolve 10, you won't have to go through that whole node setup. You will be able to process the Luma and Chroma separately from within one node. Can't wait for that. Plus, you'll be able to use NeatVideo inside Resolve.

A side note, if you have the LITE version of Resolve, you don't have the option to use noise reduction. In that case, just use the blur. In fact, I tend to use the blur instead of the noise reduction, as it seems to have less of an effect on the colors (especially skin tones). I usually find that blurring it to 62 is enough for the most obvious cases but I try to stay below 62, usually 57-60.

Thank you for these valuable insights. That was really helpful!
I'm playing around with the settings on some DSLR footage. =)

The FS100 has a narive 1080p sensor thats why theres no moire. So is it safe to say that the BMPCC will be moire free too since theres no downscaling going on?

The FS100 does have moire. It's not as much as on a DSLR that is downscaling the a high resolution sensor but its still there. It's also masked by the compression.

Moiré isn't caused by downscaling (alone), every rasterization of fine, regular patterns can cause it. Bayer pattern sensors produce colored moiré, which is even more annoying than the b/w moiré all rasterization produces. And downscaling a raster image can again cause moiré if not done properly. The only way to reduce moiré is softening, most cameras even have optical low-pass filters (OLPF) in front of the sensor to do that, trading in some sharpness and resolution for less moiré.

True. Never said it was caused by downscaling alone. But the way DSLRs downscale is inferior (often just doing line skipping) to how high end video cameras (like Alex / RED / Sony) do it. They have more processing power to assign to the task of downscaling and a result the moire is much less visible.

High end cameras don't downscale, but have proper OLPFs for their sensors.

High end cameras don't downscale

then how does the Alexa provide a 2K/1080p image w/o cropping? :/