Lightroom Classic: 10.0 - Using the "Zoom to Fill" function in the Print module shows the original, unedited version of the photo

@robert_somrak

I'm very sorry but that is not how software and operating systems work together. The problem occurs inside LR Classic 10.0 in combination with Big Sur 11.0.1, not anywhere else, not in other photography applications that I use, not in any other user environment inside Big Sur.

Applications have to adapt to the OS, not vice versa. The fact that something has changed inside the OS between Catalina and Big Sur concerning the preview of photos inside LR Classic's Print module, has to be addressed by software engineers of LR Classic, not by Apple's. I count on Adobe to fix this bug. Because I pay for software that works.

I can reproduce something similar using Lightroom 10 and Big Sur. Clicking the "Zoom to Fill" check box in the Print module zooms the image as intended but at the same time the preview is slightly desaturated. On darker images the loss of saturation is barely noticeable but on others it is quite visible.

However, printing the non-zoomed and zoomed versions (to JPEG files) results in identical images (other than the zoom) with no loss of saturation in the zoomed image.

@Rikk

Yes, I'm afraid so. I have just tested it out, and the problem is still present in LrC 10.1... 

I am still seeing this issue 10.1.

Just to expand on my post above, the loss of saturation in the zoomed version occurs regardless of whether the image has edits. I can reproduce the effect with an unedited file.

Further I have now realised that I am seeing the same behaviour in the Library module. When zooming in from Loupe view to a higher percentage the image loses saturation.

I can confirm what Paul Manuel says: the same problem occurs in the Library module when zooming in to e.g. 100% or more.

However, I notice that the photos not only show up less saturated in colours, but do miss certain basic edits, such as White Balance and Contrast.

For what it's worth, I'm seeing this problem on RAW photos of three different Sony cameras: Sony A900, Sony A700, and Sony DSC-RX10.

1. Edit a RAW file (in the Edit module) and for the sake of making the problem very visible, add lots of saturation and contrast.
2. Zoom in and out, still inside the Edit module - no difference visible between e.g. Fit and 100% or 200% etc. No problem here.
3. Switch to the Library module. In Fit view the edited RAW file looks the same as in the Edit module.
4. Still in the Library module, zoom in to 100% or more, whatever is needed to make things look big.
5. Any enlargement (zoom in) shows the photo with huge loss of saturation (and contrast).

The strange thing is that it doesn't even look like the photo without any edits (in its imported state, before any editing). I was previously wrong in stating that it looked as though all edits had disappeared. From what I see now, mainly Saturation, but as far as I can see also White Balance (because the difference in hue in the blue sky in my photos make that clear), and Contrast seem to be affected by the problem.

Strange also: Black and White RAW files look OK when zoomed in...

I have tried this with new and old photos, and the problem is there with all of them, in the Library module when zooming in, and in the Print module when the option "Zoom to Fill" is ON. I can even add a fourth camera model to my previous list above: Sony A100. But it's not related to Sony RAW (.ARW) files, as in another thread a German colleague is using Canon RAW and has the same issue in exactly the same way.

This has started to happen since the upgrade to Big Sur, but I have other editing software and only in LrC the issue is present.

FYI, I'm using an iMac 27inch, 2019, 5K with 32GB of RAM, on macOS Big Sur 11.0.1 and LrC 10.1.

I am unable to reproduce. I do  not run Big Sur yet so that may be the difference. 

Yes, definitely. LrC 10.0 did not have this issue on macOS Catalina on my system. It's due to a combination of LrC and Big Sur, but only seems to affect LrC, no other editing software.

@Lamo

Can you please confirm that the actual print also suffers from very faded colours when the "Zoom to Fill" option is used, but is OK when that option is not used?  

Yes that is correct.

Thank you for the very quick reply and confirmation. That makes the bug even worse than it already is - since two months! It means we are not able to print borderless - most probably on any printer using any paper in any size!

I find this utterly unacceptable, especially because earlier today an update was released and the problem has not been solved.

@DdeGannes 

I have reverted to LrC 10.0 until these issues have been resolved.