P: R5 colour noise slider

Hi @Rikk Flohr: Photography. I've recently upgraded to Lightroom Classic 11.1 and I'm reasonably certain the R5 colour noise handling bug has been corrected. All of a sudden, I notice that images that previously needed to have the colour noise reduction slider set to 5 now show colour noise, and I need to increase the slider to 25 to get an acceptable result.

Are you able to confirm that the bug has been fixed? Nothing in the release notes mentions this.

While I'm very pleased that the bug appears to have been fixed, it also creates rework, because I now need to go back and return the colour noise slider for all of my R5 images from 5 to 25. Really, this is a "breaking change" and should have been properly documented. It took me a while to realise something wasn't right when images at middling ISOs (1000+) started to show colour noise when I wasn't expecting it.

Thanks,

Nick

@Rikk Hey new on this thread, and hopefully this is the same issues I’m talking about, but I’m having real issues with the colour profiles. The Canon R5 raws are beautiful and I can seem them perfectly in photo mechanic as well as capture( which I’m trying to learn and this issue is killing me), but as soon as I import the raws into Lightroom they look terrible. Where is the camera profile for this and why’s it such an issue that the 2 big players in the photographic industry aren’t compatible? 
Any help or any ideas about when/ if these will be realised would be much appreciated. 

Chris - The Curries 

Thanks Todd.

Hi @Rikk I also just tried the same thing in ACR and found exactly the same behaviour. A setting of 5 with the Canon R5 looks similar to a setting of 25 with the Nikon Z7II.

For completeness, I'm using Lightroom Classic. I haven't tried Lightroom cloud.

Rikk, I can confirm the behavior nick_tompson is seeing using the DPReview test files with LrC 10.4. Camera Raw 13.4 exhibits the same issue.

Do you see the problem in Camera Raw as well as Lightroom or just in Lightroom?

@Rikk Hi - I have updated Lightroom to the latest release (v10.4) and it has made absolutely no difference to this issue. Can you please acknowledge the issue and that it has been added to a bug tracker somewhere?

Thanks,

Nick 

@Rikk will do Rikk. Are there any bug fix release notes for Lightroom Classic?

Greetings,

Updates to Lightroom Classic and the Lightroom Ecosystem products for Desktop, Mobile and Web were released today. After installing the updates (x.4) please confirm if you still see this issue after updating.

@bill_3305731 you've hit the nail on the head but completely back to front. If you look at the DPR images as is, you would conclude that there is something wrong with the camera - as you did. But in fact, the problem is with Lightroom. You can see the horrible colour smearing in the right hand image - looks like a terrible camera. But if you quickly jump into the develop module for the right hand image and wind the colour noise slider down to 5, you'll see that the colour smearing suddenly disappears.

If you then try the same thing with another camera (eg the Nikon Z7II), you'll find that the same colour smearing effect can be replicated by turning the colour noise slider up to 100.

In other words, there is absolutely nothing wrong with the camera. Lightroom, on the other hand is mangling the R5 image in a way that it doesn't for any other similar camera.

I really hope this is clear and we can focus on getting the point across to Adobe so that they can actually fix it.

@nick_tompson 

IMHO this is an indication that the Canon sensor is not ISO invariant. The colors are correct with the -0EV image and muddy with the -5EV image. I guess I don't understand but this does not appear to be a Lightroom issue to me.